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Dreyer K, van Rijswijk J, Mijatovic V, Goddijn M, Verhoeve HR, van Rooij IAJ, Hoek A, Bourdrez P, Nap AW, Rijnsaardt-Lukassen HGM, Timmerman CCM, Kaplan M, Hooker AB, Gijsen AP, van Golde R, van Heteren CF, Sluijmer AV, de Bruin JP, Smeenk JMJ, de Boer JAM, Scheenjes E, Duijn AEJ, Mozes A, Pelinck MJ, Traas MAF, van Hooff MHA, van Unnik GA, de Koning CH, van Geloven N, Twisk JWR, Hompes PGA, Mol BWJ. Oil-Based or Water-Based Contrast for Hysterosalpingography in Infertile Women. N Engl J Med 2017; 376:2043-2052. [PMID: 28520519 DOI: 10.1056/nejmoa1612337] [Citation(s) in RCA: 102] [Impact Index Per Article: 14.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
BACKGROUND Pregnancy rates among infertile women have been reported to increase after hysterosalpingography, but it is unclear whether the type of contrast medium used (oil-based or water-soluble contrast) influences this potential therapeutic effect. METHODS We performed a multicenter, randomized trial in 27 hospitals in the Netherlands in which infertile women who were undergoing hysterosalpingography were randomly assigned to undergo this procedure with the use of oil-based or water-based contrast. Subsequently, couples received expectant management or the women underwent intrauterine insemination. The primary outcome was ongoing pregnancy within 6 months after randomization. Outcomes were analyzed according to the intention-to-treat principle. RESULTS A total of 1119 women were randomly assigned to hysterosalpingography with oil contrast (557 women) or water contrast (562 women). A total of 220 of 554 women in the oil group (39.7%) and 161 of 554 women in the water group (29.1%) had an ongoing pregnancy (rate ratio, 1.37; 95% confidence interval [CI], 1.16 to 1.61; P<0.001), and 214 of 552 women in the oil group (38.8%) and 155 of 552 women in the water group (28.1%) had live births (rate ratio, 1.38; 95% CI, 1.17 to 1.64; P<0.001). Rates of adverse events were low and similar in the two groups. CONCLUSIONS Rates of ongoing pregnancy and live births were higher among women who underwent hysterosalpingography with oil contrast than among women who underwent this procedure with water contrast. (Netherlands Trial Register number, NTR3270 .).
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Affiliation(s)
- Kim Dreyer
- From the Department of Reproductive Medicine (K.D., J.R., V.M., P.G.A.H.) and the Department of Epidemiology and Biostatistics (J.W.R.T.), VU University Medical Center, the Center for Reproductive Medicine, Department of Obstetrics and Gynecology, Academic Medical Center (M.G.), the Department of Obstetrics and Gynecology, Onze Lieve Vrouwe Gasthuis (H.R.V.), and the Department of Obstetrics and Gynecology, Slotervaart Medical Center (A.E.J.D.), Amsterdam, and the Department of Obstetrics and Gynecology, TweeSteden Hospital (I.A.J.R.), and the Department of Obstetrics and Gynecology, Sint Elisabeth Hospital (J.M.J.S.), Tilburg, the Department of Reproductive Medicine and Gynecology, University of Groningen, University Medical Center Groningen, Groningen (A.H.), the Department of Obstetrics and Gynecology, VieCuri Medical Center, Venlo (P.B.), the Department of Obstetrics and Gynecology, Rijnstate Hospital, Arnhem (A.W.N.), the Department of Obstetrics and Gynecology, Albert Schweitzer Hospital, Dordrecht (H.G.M.R.-L.), the Department of Obstetrics and Gynecology, Bravis Hospital, Roosendaal (C.C.M.T.), the Department of Obstetrics and Gynecology, Röpcke-Zweers Hospital, Hardenberg (M.K.), the Department of Obstetrics and Gynecology, Zaans Medical Center, Zaandam (A.B.H.), the Department of Obstetrics and Gynecology, Elkerliek Hospital, Helmond (A.P.G.), the Department of Reproductive Medicine, Maastricht University Medical Center, Maastricht (R.G.), the Department of Obstetrics and Gynecology, Canisius-Wilhelmina Hospital, Nijmegen (C.F.H.), the Department of Obstetrics and Gynecology, Wilhelmina Hospital, Assen (A.V.S.), the Department of Obstetrics and Gynecology, Jeroen Bosch Hospital, Den Bosch (J.-P.B.), the Department of Obstetrics and Gynecology, Westfriesgasthuis, Hoorn (J.A.M.B.), the Department of Obstetrics and Gynecology, Hospital Gelderse Vallei, Ede (E.S.), the Department of Obstetrics and Gynecology, Amstelland Hospital, Amstelveen (A.M.), the Department of Obstetrics and Gynecology, Scheper Hospital, Emmen (M.J.P.), the Department of Obstetrics and Gynecology, Gelre Hospital, Apeldoorn (M.A.F.T.), the Department of Obstetrics and Gynecology, Sint Franciscus Hospital, Rotterdam (M.H.A.H.), the Department of Obstetrics and Gynecology, Diaconessenhuis (G.A.U.), and the Department of Medical Statistics and Bioinformatics, Leiden University Medical Center (N.G.), Leiden, and the Department of Obstetrics and Gynecology, Tergooi Hospital, Blaricum (C.H.K.) - all in the Netherlands; and the School of Medicine, Robinson Research Institute, University of Adelaide, and the South Australian Health and Medical Research Institute, Adelaide, SA, Australia (B.W.J.M.)
| | - Joukje van Rijswijk
- From the Department of Reproductive Medicine (K.D., J.R., V.M., P.G.A.H.) and the Department of Epidemiology and Biostatistics (J.W.R.T.), VU University Medical Center, the Center for Reproductive Medicine, Department of Obstetrics and Gynecology, Academic Medical Center (M.G.), the Department of Obstetrics and Gynecology, Onze Lieve Vrouwe Gasthuis (H.R.V.), and the Department of Obstetrics and Gynecology, Slotervaart Medical Center (A.E.J.D.), Amsterdam, and the Department of Obstetrics and Gynecology, TweeSteden Hospital (I.A.J.R.), and the Department of Obstetrics and Gynecology, Sint Elisabeth Hospital (J.M.J.S.), Tilburg, the Department of Reproductive Medicine and Gynecology, University of Groningen, University Medical Center Groningen, Groningen (A.H.), the Department of Obstetrics and Gynecology, VieCuri Medical Center, Venlo (P.B.), the Department of Obstetrics and Gynecology, Rijnstate Hospital, Arnhem (A.W.N.), the Department of Obstetrics and Gynecology, Albert Schweitzer Hospital, Dordrecht (H.G.M.R.-L.), the Department of Obstetrics and Gynecology, Bravis Hospital, Roosendaal (C.C.M.T.), the Department of Obstetrics and Gynecology, Röpcke-Zweers Hospital, Hardenberg (M.K.), the Department of Obstetrics and Gynecology, Zaans Medical Center, Zaandam (A.B.H.), the Department of Obstetrics and Gynecology, Elkerliek Hospital, Helmond (A.P.G.), the Department of Reproductive Medicine, Maastricht University Medical Center, Maastricht (R.G.), the Department of Obstetrics and Gynecology, Canisius-Wilhelmina Hospital, Nijmegen (C.F.H.), the Department of Obstetrics and Gynecology, Wilhelmina Hospital, Assen (A.V.S.), the Department of Obstetrics and Gynecology, Jeroen Bosch Hospital, Den Bosch (J.-P.B.), the Department of Obstetrics and Gynecology, Westfriesgasthuis, Hoorn (J.A.M.B.), the Department of Obstetrics and Gynecology, Hospital Gelderse Vallei, Ede (E.S.), the Department of Obstetrics and Gynecology, Amstelland Hospital, Amstelveen (A.M.), the Department of Obstetrics and Gynecology, Scheper Hospital, Emmen (M.J.P.), the Department of Obstetrics and Gynecology, Gelre Hospital, Apeldoorn (M.A.F.T.), the Department of Obstetrics and Gynecology, Sint Franciscus Hospital, Rotterdam (M.H.A.H.), the Department of Obstetrics and Gynecology, Diaconessenhuis (G.A.U.), and the Department of Medical Statistics and Bioinformatics, Leiden University Medical Center (N.G.), Leiden, and the Department of Obstetrics and Gynecology, Tergooi Hospital, Blaricum (C.H.K.) - all in the Netherlands; and the School of Medicine, Robinson Research Institute, University of Adelaide, and the South Australian Health and Medical Research Institute, Adelaide, SA, Australia (B.W.J.M.)
| | - Velja Mijatovic
- From the Department of Reproductive Medicine (K.D., J.R., V.M., P.G.A.H.) and the Department of Epidemiology and Biostatistics (J.W.R.T.), VU University Medical Center, the Center for Reproductive Medicine, Department of Obstetrics and Gynecology, Academic Medical Center (M.G.), the Department of Obstetrics and Gynecology, Onze Lieve Vrouwe Gasthuis (H.R.V.), and the Department of Obstetrics and Gynecology, Slotervaart Medical Center (A.E.J.D.), Amsterdam, and the Department of Obstetrics and Gynecology, TweeSteden Hospital (I.A.J.R.), and the Department of Obstetrics and Gynecology, Sint Elisabeth Hospital (J.M.J.S.), Tilburg, the Department of Reproductive Medicine and Gynecology, University of Groningen, University Medical Center Groningen, Groningen (A.H.), the Department of Obstetrics and Gynecology, VieCuri Medical Center, Venlo (P.B.), the Department of Obstetrics and Gynecology, Rijnstate Hospital, Arnhem (A.W.N.), the Department of Obstetrics and Gynecology, Albert Schweitzer Hospital, Dordrecht (H.G.M.R.-L.), the Department of Obstetrics and Gynecology, Bravis Hospital, Roosendaal (C.C.M.T.), the Department of Obstetrics and Gynecology, Röpcke-Zweers Hospital, Hardenberg (M.K.), the Department of Obstetrics and Gynecology, Zaans Medical Center, Zaandam (A.B.H.), the Department of Obstetrics and Gynecology, Elkerliek Hospital, Helmond (A.P.G.), the Department of Reproductive Medicine, Maastricht University Medical Center, Maastricht (R.G.), the Department of Obstetrics and Gynecology, Canisius-Wilhelmina Hospital, Nijmegen (C.F.H.), the Department of Obstetrics and Gynecology, Wilhelmina Hospital, Assen (A.V.S.), the Department of Obstetrics and Gynecology, Jeroen Bosch Hospital, Den Bosch (J.-P.B.), the Department of Obstetrics and Gynecology, Westfriesgasthuis, Hoorn (J.A.M.B.), the Department of Obstetrics and Gynecology, Hospital Gelderse Vallei, Ede (E.S.), the Department of Obstetrics and Gynecology, Amstelland Hospital, Amstelveen (A.M.), the Department of Obstetrics and Gynecology, Scheper Hospital, Emmen (M.J.P.), the Department of Obstetrics and Gynecology, Gelre Hospital, Apeldoorn (M.A.F.T.), the Department of Obstetrics and Gynecology, Sint Franciscus Hospital, Rotterdam (M.H.A.H.), the Department of Obstetrics and Gynecology, Diaconessenhuis (G.A.U.), and the Department of Medical Statistics and Bioinformatics, Leiden University Medical Center (N.G.), Leiden, and the Department of Obstetrics and Gynecology, Tergooi Hospital, Blaricum (C.H.K.) - all in the Netherlands; and the School of Medicine, Robinson Research Institute, University of Adelaide, and the South Australian Health and Medical Research Institute, Adelaide, SA, Australia (B.W.J.M.)
| | - Mariëtte Goddijn
- From the Department of Reproductive Medicine (K.D., J.R., V.M., P.G.A.H.) and the Department of Epidemiology and Biostatistics (J.W.R.T.), VU University Medical Center, the Center for Reproductive Medicine, Department of Obstetrics and Gynecology, Academic Medical Center (M.G.), the Department of Obstetrics and Gynecology, Onze Lieve Vrouwe Gasthuis (H.R.V.), and the Department of Obstetrics and Gynecology, Slotervaart Medical Center (A.E.J.D.), Amsterdam, and the Department of Obstetrics and Gynecology, TweeSteden Hospital (I.A.J.R.), and the Department of Obstetrics and Gynecology, Sint Elisabeth Hospital (J.M.J.S.), Tilburg, the Department of Reproductive Medicine and Gynecology, University of Groningen, University Medical Center Groningen, Groningen (A.H.), the Department of Obstetrics and Gynecology, VieCuri Medical Center, Venlo (P.B.), the Department of Obstetrics and Gynecology, Rijnstate Hospital, Arnhem (A.W.N.), the Department of Obstetrics and Gynecology, Albert Schweitzer Hospital, Dordrecht (H.G.M.R.-L.), the Department of Obstetrics and Gynecology, Bravis Hospital, Roosendaal (C.C.M.T.), the Department of Obstetrics and Gynecology, Röpcke-Zweers Hospital, Hardenberg (M.K.), the Department of Obstetrics and Gynecology, Zaans Medical Center, Zaandam (A.B.H.), the Department of Obstetrics and Gynecology, Elkerliek Hospital, Helmond (A.P.G.), the Department of Reproductive Medicine, Maastricht University Medical Center, Maastricht (R.G.), the Department of Obstetrics and Gynecology, Canisius-Wilhelmina Hospital, Nijmegen (C.F.H.), the Department of Obstetrics and Gynecology, Wilhelmina Hospital, Assen (A.V.S.), the Department of Obstetrics and Gynecology, Jeroen Bosch Hospital, Den Bosch (J.-P.B.), the Department of Obstetrics and Gynecology, Westfriesgasthuis, Hoorn (J.A.M.B.), the Department of Obstetrics and Gynecology, Hospital Gelderse Vallei, Ede (E.S.), the Department of Obstetrics and Gynecology, Amstelland Hospital, Amstelveen (A.M.), the Department of Obstetrics and Gynecology, Scheper Hospital, Emmen (M.J.P.), the Department of Obstetrics and Gynecology, Gelre Hospital, Apeldoorn (M.A.F.T.), the Department of Obstetrics and Gynecology, Sint Franciscus Hospital, Rotterdam (M.H.A.H.), the Department of Obstetrics and Gynecology, Diaconessenhuis (G.A.U.), and the Department of Medical Statistics and Bioinformatics, Leiden University Medical Center (N.G.), Leiden, and the Department of Obstetrics and Gynecology, Tergooi Hospital, Blaricum (C.H.K.) - all in the Netherlands; and the School of Medicine, Robinson Research Institute, University of Adelaide, and the South Australian Health and Medical Research Institute, Adelaide, SA, Australia (B.W.J.M.)
| | - Harold R Verhoeve
- From the Department of Reproductive Medicine (K.D., J.R., V.M., P.G.A.H.) and the Department of Epidemiology and Biostatistics (J.W.R.T.), VU University Medical Center, the Center for Reproductive Medicine, Department of Obstetrics and Gynecology, Academic Medical Center (M.G.), the Department of Obstetrics and Gynecology, Onze Lieve Vrouwe Gasthuis (H.R.V.), and the Department of Obstetrics and Gynecology, Slotervaart Medical Center (A.E.J.D.), Amsterdam, and the Department of Obstetrics and Gynecology, TweeSteden Hospital (I.A.J.R.), and the Department of Obstetrics and Gynecology, Sint Elisabeth Hospital (J.M.J.S.), Tilburg, the Department of Reproductive Medicine and Gynecology, University of Groningen, University Medical Center Groningen, Groningen (A.H.), the Department of Obstetrics and Gynecology, VieCuri Medical Center, Venlo (P.B.), the Department of Obstetrics and Gynecology, Rijnstate Hospital, Arnhem (A.W.N.), the Department of Obstetrics and Gynecology, Albert Schweitzer Hospital, Dordrecht (H.G.M.R.-L.), the Department of Obstetrics and Gynecology, Bravis Hospital, Roosendaal (C.C.M.T.), the Department of Obstetrics and Gynecology, Röpcke-Zweers Hospital, Hardenberg (M.K.), the Department of Obstetrics and Gynecology, Zaans Medical Center, Zaandam (A.B.H.), the Department of Obstetrics and Gynecology, Elkerliek Hospital, Helmond (A.P.G.), the Department of Reproductive Medicine, Maastricht University Medical Center, Maastricht (R.G.), the Department of Obstetrics and Gynecology, Canisius-Wilhelmina Hospital, Nijmegen (C.F.H.), the Department of Obstetrics and Gynecology, Wilhelmina Hospital, Assen (A.V.S.), the Department of Obstetrics and Gynecology, Jeroen Bosch Hospital, Den Bosch (J.-P.B.), the Department of Obstetrics and Gynecology, Westfriesgasthuis, Hoorn (J.A.M.B.), the Department of Obstetrics and Gynecology, Hospital Gelderse Vallei, Ede (E.S.), the Department of Obstetrics and Gynecology, Amstelland Hospital, Amstelveen (A.M.), the Department of Obstetrics and Gynecology, Scheper Hospital, Emmen (M.J.P.), the Department of Obstetrics and Gynecology, Gelre Hospital, Apeldoorn (M.A.F.T.), the Department of Obstetrics and Gynecology, Sint Franciscus Hospital, Rotterdam (M.H.A.H.), the Department of Obstetrics and Gynecology, Diaconessenhuis (G.A.U.), and the Department of Medical Statistics and Bioinformatics, Leiden University Medical Center (N.G.), Leiden, and the Department of Obstetrics and Gynecology, Tergooi Hospital, Blaricum (C.H.K.) - all in the Netherlands; and the School of Medicine, Robinson Research Institute, University of Adelaide, and the South Australian Health and Medical Research Institute, Adelaide, SA, Australia (B.W.J.M.)
| | - Ilse A J van Rooij
- From the Department of Reproductive Medicine (K.D., J.R., V.M., P.G.A.H.) and the Department of Epidemiology and Biostatistics (J.W.R.T.), VU University Medical Center, the Center for Reproductive Medicine, Department of Obstetrics and Gynecology, Academic Medical Center (M.G.), the Department of Obstetrics and Gynecology, Onze Lieve Vrouwe Gasthuis (H.R.V.), and the Department of Obstetrics and Gynecology, Slotervaart Medical Center (A.E.J.D.), Amsterdam, and the Department of Obstetrics and Gynecology, TweeSteden Hospital (I.A.J.R.), and the Department of Obstetrics and Gynecology, Sint Elisabeth Hospital (J.M.J.S.), Tilburg, the Department of Reproductive Medicine and Gynecology, University of Groningen, University Medical Center Groningen, Groningen (A.H.), the Department of Obstetrics and Gynecology, VieCuri Medical Center, Venlo (P.B.), the Department of Obstetrics and Gynecology, Rijnstate Hospital, Arnhem (A.W.N.), the Department of Obstetrics and Gynecology, Albert Schweitzer Hospital, Dordrecht (H.G.M.R.-L.), the Department of Obstetrics and Gynecology, Bravis Hospital, Roosendaal (C.C.M.T.), the Department of Obstetrics and Gynecology, Röpcke-Zweers Hospital, Hardenberg (M.K.), the Department of Obstetrics and Gynecology, Zaans Medical Center, Zaandam (A.B.H.), the Department of Obstetrics and Gynecology, Elkerliek Hospital, Helmond (A.P.G.), the Department of Reproductive Medicine, Maastricht University Medical Center, Maastricht (R.G.), the Department of Obstetrics and Gynecology, Canisius-Wilhelmina Hospital, Nijmegen (C.F.H.), the Department of Obstetrics and Gynecology, Wilhelmina Hospital, Assen (A.V.S.), the Department of Obstetrics and Gynecology, Jeroen Bosch Hospital, Den Bosch (J.-P.B.), the Department of Obstetrics and Gynecology, Westfriesgasthuis, Hoorn (J.A.M.B.), the Department of Obstetrics and Gynecology, Hospital Gelderse Vallei, Ede (E.S.), the Department of Obstetrics and Gynecology, Amstelland Hospital, Amstelveen (A.M.), the Department of Obstetrics and Gynecology, Scheper Hospital, Emmen (M.J.P.), the Department of Obstetrics and Gynecology, Gelre Hospital, Apeldoorn (M.A.F.T.), the Department of Obstetrics and Gynecology, Sint Franciscus Hospital, Rotterdam (M.H.A.H.), the Department of Obstetrics and Gynecology, Diaconessenhuis (G.A.U.), and the Department of Medical Statistics and Bioinformatics, Leiden University Medical Center (N.G.), Leiden, and the Department of Obstetrics and Gynecology, Tergooi Hospital, Blaricum (C.H.K.) - all in the Netherlands; and the School of Medicine, Robinson Research Institute, University of Adelaide, and the South Australian Health and Medical Research Institute, Adelaide, SA, Australia (B.W.J.M.)
| | - Annemieke Hoek
- From the Department of Reproductive Medicine (K.D., J.R., V.M., P.G.A.H.) and the Department of Epidemiology and Biostatistics (J.W.R.T.), VU University Medical Center, the Center for Reproductive Medicine, Department of Obstetrics and Gynecology, Academic Medical Center (M.G.), the Department of Obstetrics and Gynecology, Onze Lieve Vrouwe Gasthuis (H.R.V.), and the Department of Obstetrics and Gynecology, Slotervaart Medical Center (A.E.J.D.), Amsterdam, and the Department of Obstetrics and Gynecology, TweeSteden Hospital (I.A.J.R.), and the Department of Obstetrics and Gynecology, Sint Elisabeth Hospital (J.M.J.S.), Tilburg, the Department of Reproductive Medicine and Gynecology, University of Groningen, University Medical Center Groningen, Groningen (A.H.), the Department of Obstetrics and Gynecology, VieCuri Medical Center, Venlo (P.B.), the Department of Obstetrics and Gynecology, Rijnstate Hospital, Arnhem (A.W.N.), the Department of Obstetrics and Gynecology, Albert Schweitzer Hospital, Dordrecht (H.G.M.R.-L.), the Department of Obstetrics and Gynecology, Bravis Hospital, Roosendaal (C.C.M.T.), the Department of Obstetrics and Gynecology, Röpcke-Zweers Hospital, Hardenberg (M.K.), the Department of Obstetrics and Gynecology, Zaans Medical Center, Zaandam (A.B.H.), the Department of Obstetrics and Gynecology, Elkerliek Hospital, Helmond (A.P.G.), the Department of Reproductive Medicine, Maastricht University Medical Center, Maastricht (R.G.), the Department of Obstetrics and Gynecology, Canisius-Wilhelmina Hospital, Nijmegen (C.F.H.), the Department of Obstetrics and Gynecology, Wilhelmina Hospital, Assen (A.V.S.), the Department of Obstetrics and Gynecology, Jeroen Bosch Hospital, Den Bosch (J.-P.B.), the Department of Obstetrics and Gynecology, Westfriesgasthuis, Hoorn (J.A.M.B.), the Department of Obstetrics and Gynecology, Hospital Gelderse Vallei, Ede (E.S.), the Department of Obstetrics and Gynecology, Amstelland Hospital, Amstelveen (A.M.), the Department of Obstetrics and Gynecology, Scheper Hospital, Emmen (M.J.P.), the Department of Obstetrics and Gynecology, Gelre Hospital, Apeldoorn (M.A.F.T.), the Department of Obstetrics and Gynecology, Sint Franciscus Hospital, Rotterdam (M.H.A.H.), the Department of Obstetrics and Gynecology, Diaconessenhuis (G.A.U.), and the Department of Medical Statistics and Bioinformatics, Leiden University Medical Center (N.G.), Leiden, and the Department of Obstetrics and Gynecology, Tergooi Hospital, Blaricum (C.H.K.) - all in the Netherlands; and the School of Medicine, Robinson Research Institute, University of Adelaide, and the South Australian Health and Medical Research Institute, Adelaide, SA, Australia (B.W.J.M.)
| | - Petra Bourdrez
- From the Department of Reproductive Medicine (K.D., J.R., V.M., P.G.A.H.) and the Department of Epidemiology and Biostatistics (J.W.R.T.), VU University Medical Center, the Center for Reproductive Medicine, Department of Obstetrics and Gynecology, Academic Medical Center (M.G.), the Department of Obstetrics and Gynecology, Onze Lieve Vrouwe Gasthuis (H.R.V.), and the Department of Obstetrics and Gynecology, Slotervaart Medical Center (A.E.J.D.), Amsterdam, and the Department of Obstetrics and Gynecology, TweeSteden Hospital (I.A.J.R.), and the Department of Obstetrics and Gynecology, Sint Elisabeth Hospital (J.M.J.S.), Tilburg, the Department of Reproductive Medicine and Gynecology, University of Groningen, University Medical Center Groningen, Groningen (A.H.), the Department of Obstetrics and Gynecology, VieCuri Medical Center, Venlo (P.B.), the Department of Obstetrics and Gynecology, Rijnstate Hospital, Arnhem (A.W.N.), the Department of Obstetrics and Gynecology, Albert Schweitzer Hospital, Dordrecht (H.G.M.R.-L.), the Department of Obstetrics and Gynecology, Bravis Hospital, Roosendaal (C.C.M.T.), the Department of Obstetrics and Gynecology, Röpcke-Zweers Hospital, Hardenberg (M.K.), the Department of Obstetrics and Gynecology, Zaans Medical Center, Zaandam (A.B.H.), the Department of Obstetrics and Gynecology, Elkerliek Hospital, Helmond (A.P.G.), the Department of Reproductive Medicine, Maastricht University Medical Center, Maastricht (R.G.), the Department of Obstetrics and Gynecology, Canisius-Wilhelmina Hospital, Nijmegen (C.F.H.), the Department of Obstetrics and Gynecology, Wilhelmina Hospital, Assen (A.V.S.), the Department of Obstetrics and Gynecology, Jeroen Bosch Hospital, Den Bosch (J.-P.B.), the Department of Obstetrics and Gynecology, Westfriesgasthuis, Hoorn (J.A.M.B.), the Department of Obstetrics and Gynecology, Hospital Gelderse Vallei, Ede (E.S.), the Department of Obstetrics and Gynecology, Amstelland Hospital, Amstelveen (A.M.), the Department of Obstetrics and Gynecology, Scheper Hospital, Emmen (M.J.P.), the Department of Obstetrics and Gynecology, Gelre Hospital, Apeldoorn (M.A.F.T.), the Department of Obstetrics and Gynecology, Sint Franciscus Hospital, Rotterdam (M.H.A.H.), the Department of Obstetrics and Gynecology, Diaconessenhuis (G.A.U.), and the Department of Medical Statistics and Bioinformatics, Leiden University Medical Center (N.G.), Leiden, and the Department of Obstetrics and Gynecology, Tergooi Hospital, Blaricum (C.H.K.) - all in the Netherlands; and the School of Medicine, Robinson Research Institute, University of Adelaide, and the South Australian Health and Medical Research Institute, Adelaide, SA, Australia (B.W.J.M.)
| | - Annemiek W Nap
- From the Department of Reproductive Medicine (K.D., J.R., V.M., P.G.A.H.) and the Department of Epidemiology and Biostatistics (J.W.R.T.), VU University Medical Center, the Center for Reproductive Medicine, Department of Obstetrics and Gynecology, Academic Medical Center (M.G.), the Department of Obstetrics and Gynecology, Onze Lieve Vrouwe Gasthuis (H.R.V.), and the Department of Obstetrics and Gynecology, Slotervaart Medical Center (A.E.J.D.), Amsterdam, and the Department of Obstetrics and Gynecology, TweeSteden Hospital (I.A.J.R.), and the Department of Obstetrics and Gynecology, Sint Elisabeth Hospital (J.M.J.S.), Tilburg, the Department of Reproductive Medicine and Gynecology, University of Groningen, University Medical Center Groningen, Groningen (A.H.), the Department of Obstetrics and Gynecology, VieCuri Medical Center, Venlo (P.B.), the Department of Obstetrics and Gynecology, Rijnstate Hospital, Arnhem (A.W.N.), the Department of Obstetrics and Gynecology, Albert Schweitzer Hospital, Dordrecht (H.G.M.R.-L.), the Department of Obstetrics and Gynecology, Bravis Hospital, Roosendaal (C.C.M.T.), the Department of Obstetrics and Gynecology, Röpcke-Zweers Hospital, Hardenberg (M.K.), the Department of Obstetrics and Gynecology, Zaans Medical Center, Zaandam (A.B.H.), the Department of Obstetrics and Gynecology, Elkerliek Hospital, Helmond (A.P.G.), the Department of Reproductive Medicine, Maastricht University Medical Center, Maastricht (R.G.), the Department of Obstetrics and Gynecology, Canisius-Wilhelmina Hospital, Nijmegen (C.F.H.), the Department of Obstetrics and Gynecology, Wilhelmina Hospital, Assen (A.V.S.), the Department of Obstetrics and Gynecology, Jeroen Bosch Hospital, Den Bosch (J.-P.B.), the Department of Obstetrics and Gynecology, Westfriesgasthuis, Hoorn (J.A.M.B.), the Department of Obstetrics and Gynecology, Hospital Gelderse Vallei, Ede (E.S.), the Department of Obstetrics and Gynecology, Amstelland Hospital, Amstelveen (A.M.), the Department of Obstetrics and Gynecology, Scheper Hospital, Emmen (M.J.P.), the Department of Obstetrics and Gynecology, Gelre Hospital, Apeldoorn (M.A.F.T.), the Department of Obstetrics and Gynecology, Sint Franciscus Hospital, Rotterdam (M.H.A.H.), the Department of Obstetrics and Gynecology, Diaconessenhuis (G.A.U.), and the Department of Medical Statistics and Bioinformatics, Leiden University Medical Center (N.G.), Leiden, and the Department of Obstetrics and Gynecology, Tergooi Hospital, Blaricum (C.H.K.) - all in the Netherlands; and the School of Medicine, Robinson Research Institute, University of Adelaide, and the South Australian Health and Medical Research Institute, Adelaide, SA, Australia (B.W.J.M.)
| | - Henrike G M Rijnsaardt-Lukassen
- From the Department of Reproductive Medicine (K.D., J.R., V.M., P.G.A.H.) and the Department of Epidemiology and Biostatistics (J.W.R.T.), VU University Medical Center, the Center for Reproductive Medicine, Department of Obstetrics and Gynecology, Academic Medical Center (M.G.), the Department of Obstetrics and Gynecology, Onze Lieve Vrouwe Gasthuis (H.R.V.), and the Department of Obstetrics and Gynecology, Slotervaart Medical Center (A.E.J.D.), Amsterdam, and the Department of Obstetrics and Gynecology, TweeSteden Hospital (I.A.J.R.), and the Department of Obstetrics and Gynecology, Sint Elisabeth Hospital (J.M.J.S.), Tilburg, the Department of Reproductive Medicine and Gynecology, University of Groningen, University Medical Center Groningen, Groningen (A.H.), the Department of Obstetrics and Gynecology, VieCuri Medical Center, Venlo (P.B.), the Department of Obstetrics and Gynecology, Rijnstate Hospital, Arnhem (A.W.N.), the Department of Obstetrics and Gynecology, Albert Schweitzer Hospital, Dordrecht (H.G.M.R.-L.), the Department of Obstetrics and Gynecology, Bravis Hospital, Roosendaal (C.C.M.T.), the Department of Obstetrics and Gynecology, Röpcke-Zweers Hospital, Hardenberg (M.K.), the Department of Obstetrics and Gynecology, Zaans Medical Center, Zaandam (A.B.H.), the Department of Obstetrics and Gynecology, Elkerliek Hospital, Helmond (A.P.G.), the Department of Reproductive Medicine, Maastricht University Medical Center, Maastricht (R.G.), the Department of Obstetrics and Gynecology, Canisius-Wilhelmina Hospital, Nijmegen (C.F.H.), the Department of Obstetrics and Gynecology, Wilhelmina Hospital, Assen (A.V.S.), the Department of Obstetrics and Gynecology, Jeroen Bosch Hospital, Den Bosch (J.-P.B.), the Department of Obstetrics and Gynecology, Westfriesgasthuis, Hoorn (J.A.M.B.), the Department of Obstetrics and Gynecology, Hospital Gelderse Vallei, Ede (E.S.), the Department of Obstetrics and Gynecology, Amstelland Hospital, Amstelveen (A.M.), the Department of Obstetrics and Gynecology, Scheper Hospital, Emmen (M.J.P.), the Department of Obstetrics and Gynecology, Gelre Hospital, Apeldoorn (M.A.F.T.), the Department of Obstetrics and Gynecology, Sint Franciscus Hospital, Rotterdam (M.H.A.H.), the Department of Obstetrics and Gynecology, Diaconessenhuis (G.A.U.), and the Department of Medical Statistics and Bioinformatics, Leiden University Medical Center (N.G.), Leiden, and the Department of Obstetrics and Gynecology, Tergooi Hospital, Blaricum (C.H.K.) - all in the Netherlands; and the School of Medicine, Robinson Research Institute, University of Adelaide, and the South Australian Health and Medical Research Institute, Adelaide, SA, Australia (B.W.J.M.)
| | - Catharina C M Timmerman
- From the Department of Reproductive Medicine (K.D., J.R., V.M., P.G.A.H.) and the Department of Epidemiology and Biostatistics (J.W.R.T.), VU University Medical Center, the Center for Reproductive Medicine, Department of Obstetrics and Gynecology, Academic Medical Center (M.G.), the Department of Obstetrics and Gynecology, Onze Lieve Vrouwe Gasthuis (H.R.V.), and the Department of Obstetrics and Gynecology, Slotervaart Medical Center (A.E.J.D.), Amsterdam, and the Department of Obstetrics and Gynecology, TweeSteden Hospital (I.A.J.R.), and the Department of Obstetrics and Gynecology, Sint Elisabeth Hospital (J.M.J.S.), Tilburg, the Department of Reproductive Medicine and Gynecology, University of Groningen, University Medical Center Groningen, Groningen (A.H.), the Department of Obstetrics and Gynecology, VieCuri Medical Center, Venlo (P.B.), the Department of Obstetrics and Gynecology, Rijnstate Hospital, Arnhem (A.W.N.), the Department of Obstetrics and Gynecology, Albert Schweitzer Hospital, Dordrecht (H.G.M.R.-L.), the Department of Obstetrics and Gynecology, Bravis Hospital, Roosendaal (C.C.M.T.), the Department of Obstetrics and Gynecology, Röpcke-Zweers Hospital, Hardenberg (M.K.), the Department of Obstetrics and Gynecology, Zaans Medical Center, Zaandam (A.B.H.), the Department of Obstetrics and Gynecology, Elkerliek Hospital, Helmond (A.P.G.), the Department of Reproductive Medicine, Maastricht University Medical Center, Maastricht (R.G.), the Department of Obstetrics and Gynecology, Canisius-Wilhelmina Hospital, Nijmegen (C.F.H.), the Department of Obstetrics and Gynecology, Wilhelmina Hospital, Assen (A.V.S.), the Department of Obstetrics and Gynecology, Jeroen Bosch Hospital, Den Bosch (J.-P.B.), the Department of Obstetrics and Gynecology, Westfriesgasthuis, Hoorn (J.A.M.B.), the Department of Obstetrics and Gynecology, Hospital Gelderse Vallei, Ede (E.S.), the Department of Obstetrics and Gynecology, Amstelland Hospital, Amstelveen (A.M.), the Department of Obstetrics and Gynecology, Scheper Hospital, Emmen (M.J.P.), the Department of Obstetrics and Gynecology, Gelre Hospital, Apeldoorn (M.A.F.T.), the Department of Obstetrics and Gynecology, Sint Franciscus Hospital, Rotterdam (M.H.A.H.), the Department of Obstetrics and Gynecology, Diaconessenhuis (G.A.U.), and the Department of Medical Statistics and Bioinformatics, Leiden University Medical Center (N.G.), Leiden, and the Department of Obstetrics and Gynecology, Tergooi Hospital, Blaricum (C.H.K.) - all in the Netherlands; and the School of Medicine, Robinson Research Institute, University of Adelaide, and the South Australian Health and Medical Research Institute, Adelaide, SA, Australia (B.W.J.M.)
| | - Mesrure Kaplan
- From the Department of Reproductive Medicine (K.D., J.R., V.M., P.G.A.H.) and the Department of Epidemiology and Biostatistics (J.W.R.T.), VU University Medical Center, the Center for Reproductive Medicine, Department of Obstetrics and Gynecology, Academic Medical Center (M.G.), the Department of Obstetrics and Gynecology, Onze Lieve Vrouwe Gasthuis (H.R.V.), and the Department of Obstetrics and Gynecology, Slotervaart Medical Center (A.E.J.D.), Amsterdam, and the Department of Obstetrics and Gynecology, TweeSteden Hospital (I.A.J.R.), and the Department of Obstetrics and Gynecology, Sint Elisabeth Hospital (J.M.J.S.), Tilburg, the Department of Reproductive Medicine and Gynecology, University of Groningen, University Medical Center Groningen, Groningen (A.H.), the Department of Obstetrics and Gynecology, VieCuri Medical Center, Venlo (P.B.), the Department of Obstetrics and Gynecology, Rijnstate Hospital, Arnhem (A.W.N.), the Department of Obstetrics and Gynecology, Albert Schweitzer Hospital, Dordrecht (H.G.M.R.-L.), the Department of Obstetrics and Gynecology, Bravis Hospital, Roosendaal (C.C.M.T.), the Department of Obstetrics and Gynecology, Röpcke-Zweers Hospital, Hardenberg (M.K.), the Department of Obstetrics and Gynecology, Zaans Medical Center, Zaandam (A.B.H.), the Department of Obstetrics and Gynecology, Elkerliek Hospital, Helmond (A.P.G.), the Department of Reproductive Medicine, Maastricht University Medical Center, Maastricht (R.G.), the Department of Obstetrics and Gynecology, Canisius-Wilhelmina Hospital, Nijmegen (C.F.H.), the Department of Obstetrics and Gynecology, Wilhelmina Hospital, Assen (A.V.S.), the Department of Obstetrics and Gynecology, Jeroen Bosch Hospital, Den Bosch (J.-P.B.), the Department of Obstetrics and Gynecology, Westfriesgasthuis, Hoorn (J.A.M.B.), the Department of Obstetrics and Gynecology, Hospital Gelderse Vallei, Ede (E.S.), the Department of Obstetrics and Gynecology, Amstelland Hospital, Amstelveen (A.M.), the Department of Obstetrics and Gynecology, Scheper Hospital, Emmen (M.J.P.), the Department of Obstetrics and Gynecology, Gelre Hospital, Apeldoorn (M.A.F.T.), the Department of Obstetrics and Gynecology, Sint Franciscus Hospital, Rotterdam (M.H.A.H.), the Department of Obstetrics and Gynecology, Diaconessenhuis (G.A.U.), and the Department of Medical Statistics and Bioinformatics, Leiden University Medical Center (N.G.), Leiden, and the Department of Obstetrics and Gynecology, Tergooi Hospital, Blaricum (C.H.K.) - all in the Netherlands; and the School of Medicine, Robinson Research Institute, University of Adelaide, and the South Australian Health and Medical Research Institute, Adelaide, SA, Australia (B.W.J.M.)
| | - Angelo B Hooker
- From the Department of Reproductive Medicine (K.D., J.R., V.M., P.G.A.H.) and the Department of Epidemiology and Biostatistics (J.W.R.T.), VU University Medical Center, the Center for Reproductive Medicine, Department of Obstetrics and Gynecology, Academic Medical Center (M.G.), the Department of Obstetrics and Gynecology, Onze Lieve Vrouwe Gasthuis (H.R.V.), and the Department of Obstetrics and Gynecology, Slotervaart Medical Center (A.E.J.D.), Amsterdam, and the Department of Obstetrics and Gynecology, TweeSteden Hospital (I.A.J.R.), and the Department of Obstetrics and Gynecology, Sint Elisabeth Hospital (J.M.J.S.), Tilburg, the Department of Reproductive Medicine and Gynecology, University of Groningen, University Medical Center Groningen, Groningen (A.H.), the Department of Obstetrics and Gynecology, VieCuri Medical Center, Venlo (P.B.), the Department of Obstetrics and Gynecology, Rijnstate Hospital, Arnhem (A.W.N.), the Department of Obstetrics and Gynecology, Albert Schweitzer Hospital, Dordrecht (H.G.M.R.-L.), the Department of Obstetrics and Gynecology, Bravis Hospital, Roosendaal (C.C.M.T.), the Department of Obstetrics and Gynecology, Röpcke-Zweers Hospital, Hardenberg (M.K.), the Department of Obstetrics and Gynecology, Zaans Medical Center, Zaandam (A.B.H.), the Department of Obstetrics and Gynecology, Elkerliek Hospital, Helmond (A.P.G.), the Department of Reproductive Medicine, Maastricht University Medical Center, Maastricht (R.G.), the Department of Obstetrics and Gynecology, Canisius-Wilhelmina Hospital, Nijmegen (C.F.H.), the Department of Obstetrics and Gynecology, Wilhelmina Hospital, Assen (A.V.S.), the Department of Obstetrics and Gynecology, Jeroen Bosch Hospital, Den Bosch (J.-P.B.), the Department of Obstetrics and Gynecology, Westfriesgasthuis, Hoorn (J.A.M.B.), the Department of Obstetrics and Gynecology, Hospital Gelderse Vallei, Ede (E.S.), the Department of Obstetrics and Gynecology, Amstelland Hospital, Amstelveen (A.M.), the Department of Obstetrics and Gynecology, Scheper Hospital, Emmen (M.J.P.), the Department of Obstetrics and Gynecology, Gelre Hospital, Apeldoorn (M.A.F.T.), the Department of Obstetrics and Gynecology, Sint Franciscus Hospital, Rotterdam (M.H.A.H.), the Department of Obstetrics and Gynecology, Diaconessenhuis (G.A.U.), and the Department of Medical Statistics and Bioinformatics, Leiden University Medical Center (N.G.), Leiden, and the Department of Obstetrics and Gynecology, Tergooi Hospital, Blaricum (C.H.K.) - all in the Netherlands; and the School of Medicine, Robinson Research Institute, University of Adelaide, and the South Australian Health and Medical Research Institute, Adelaide, SA, Australia (B.W.J.M.)
| | - Anna P Gijsen
- From the Department of Reproductive Medicine (K.D., J.R., V.M., P.G.A.H.) and the Department of Epidemiology and Biostatistics (J.W.R.T.), VU University Medical Center, the Center for Reproductive Medicine, Department of Obstetrics and Gynecology, Academic Medical Center (M.G.), the Department of Obstetrics and Gynecology, Onze Lieve Vrouwe Gasthuis (H.R.V.), and the Department of Obstetrics and Gynecology, Slotervaart Medical Center (A.E.J.D.), Amsterdam, and the Department of Obstetrics and Gynecology, TweeSteden Hospital (I.A.J.R.), and the Department of Obstetrics and Gynecology, Sint Elisabeth Hospital (J.M.J.S.), Tilburg, the Department of Reproductive Medicine and Gynecology, University of Groningen, University Medical Center Groningen, Groningen (A.H.), the Department of Obstetrics and Gynecology, VieCuri Medical Center, Venlo (P.B.), the Department of Obstetrics and Gynecology, Rijnstate Hospital, Arnhem (A.W.N.), the Department of Obstetrics and Gynecology, Albert Schweitzer Hospital, Dordrecht (H.G.M.R.-L.), the Department of Obstetrics and Gynecology, Bravis Hospital, Roosendaal (C.C.M.T.), the Department of Obstetrics and Gynecology, Röpcke-Zweers Hospital, Hardenberg (M.K.), the Department of Obstetrics and Gynecology, Zaans Medical Center, Zaandam (A.B.H.), the Department of Obstetrics and Gynecology, Elkerliek Hospital, Helmond (A.P.G.), the Department of Reproductive Medicine, Maastricht University Medical Center, Maastricht (R.G.), the Department of Obstetrics and Gynecology, Canisius-Wilhelmina Hospital, Nijmegen (C.F.H.), the Department of Obstetrics and Gynecology, Wilhelmina Hospital, Assen (A.V.S.), the Department of Obstetrics and Gynecology, Jeroen Bosch Hospital, Den Bosch (J.-P.B.), the Department of Obstetrics and Gynecology, Westfriesgasthuis, Hoorn (J.A.M.B.), the Department of Obstetrics and Gynecology, Hospital Gelderse Vallei, Ede (E.S.), the Department of Obstetrics and Gynecology, Amstelland Hospital, Amstelveen (A.M.), the Department of Obstetrics and Gynecology, Scheper Hospital, Emmen (M.J.P.), the Department of Obstetrics and Gynecology, Gelre Hospital, Apeldoorn (M.A.F.T.), the Department of Obstetrics and Gynecology, Sint Franciscus Hospital, Rotterdam (M.H.A.H.), the Department of Obstetrics and Gynecology, Diaconessenhuis (G.A.U.), and the Department of Medical Statistics and Bioinformatics, Leiden University Medical Center (N.G.), Leiden, and the Department of Obstetrics and Gynecology, Tergooi Hospital, Blaricum (C.H.K.) - all in the Netherlands; and the School of Medicine, Robinson Research Institute, University of Adelaide, and the South Australian Health and Medical Research Institute, Adelaide, SA, Australia (B.W.J.M.)
| | - Ron van Golde
- From the Department of Reproductive Medicine (K.D., J.R., V.M., P.G.A.H.) and the Department of Epidemiology and Biostatistics (J.W.R.T.), VU University Medical Center, the Center for Reproductive Medicine, Department of Obstetrics and Gynecology, Academic Medical Center (M.G.), the Department of Obstetrics and Gynecology, Onze Lieve Vrouwe Gasthuis (H.R.V.), and the Department of Obstetrics and Gynecology, Slotervaart Medical Center (A.E.J.D.), Amsterdam, and the Department of Obstetrics and Gynecology, TweeSteden Hospital (I.A.J.R.), and the Department of Obstetrics and Gynecology, Sint Elisabeth Hospital (J.M.J.S.), Tilburg, the Department of Reproductive Medicine and Gynecology, University of Groningen, University Medical Center Groningen, Groningen (A.H.), the Department of Obstetrics and Gynecology, VieCuri Medical Center, Venlo (P.B.), the Department of Obstetrics and Gynecology, Rijnstate Hospital, Arnhem (A.W.N.), the Department of Obstetrics and Gynecology, Albert Schweitzer Hospital, Dordrecht (H.G.M.R.-L.), the Department of Obstetrics and Gynecology, Bravis Hospital, Roosendaal (C.C.M.T.), the Department of Obstetrics and Gynecology, Röpcke-Zweers Hospital, Hardenberg (M.K.), the Department of Obstetrics and Gynecology, Zaans Medical Center, Zaandam (A.B.H.), the Department of Obstetrics and Gynecology, Elkerliek Hospital, Helmond (A.P.G.), the Department of Reproductive Medicine, Maastricht University Medical Center, Maastricht (R.G.), the Department of Obstetrics and Gynecology, Canisius-Wilhelmina Hospital, Nijmegen (C.F.H.), the Department of Obstetrics and Gynecology, Wilhelmina Hospital, Assen (A.V.S.), the Department of Obstetrics and Gynecology, Jeroen Bosch Hospital, Den Bosch (J.-P.B.), the Department of Obstetrics and Gynecology, Westfriesgasthuis, Hoorn (J.A.M.B.), the Department of Obstetrics and Gynecology, Hospital Gelderse Vallei, Ede (E.S.), the Department of Obstetrics and Gynecology, Amstelland Hospital, Amstelveen (A.M.), the Department of Obstetrics and Gynecology, Scheper Hospital, Emmen (M.J.P.), the Department of Obstetrics and Gynecology, Gelre Hospital, Apeldoorn (M.A.F.T.), the Department of Obstetrics and Gynecology, Sint Franciscus Hospital, Rotterdam (M.H.A.H.), the Department of Obstetrics and Gynecology, Diaconessenhuis (G.A.U.), and the Department of Medical Statistics and Bioinformatics, Leiden University Medical Center (N.G.), Leiden, and the Department of Obstetrics and Gynecology, Tergooi Hospital, Blaricum (C.H.K.) - all in the Netherlands; and the School of Medicine, Robinson Research Institute, University of Adelaide, and the South Australian Health and Medical Research Institute, Adelaide, SA, Australia (B.W.J.M.)
| | - Cathelijne F van Heteren
- From the Department of Reproductive Medicine (K.D., J.R., V.M., P.G.A.H.) and the Department of Epidemiology and Biostatistics (J.W.R.T.), VU University Medical Center, the Center for Reproductive Medicine, Department of Obstetrics and Gynecology, Academic Medical Center (M.G.), the Department of Obstetrics and Gynecology, Onze Lieve Vrouwe Gasthuis (H.R.V.), and the Department of Obstetrics and Gynecology, Slotervaart Medical Center (A.E.J.D.), Amsterdam, and the Department of Obstetrics and Gynecology, TweeSteden Hospital (I.A.J.R.), and the Department of Obstetrics and Gynecology, Sint Elisabeth Hospital (J.M.J.S.), Tilburg, the Department of Reproductive Medicine and Gynecology, University of Groningen, University Medical Center Groningen, Groningen (A.H.), the Department of Obstetrics and Gynecology, VieCuri Medical Center, Venlo (P.B.), the Department of Obstetrics and Gynecology, Rijnstate Hospital, Arnhem (A.W.N.), the Department of Obstetrics and Gynecology, Albert Schweitzer Hospital, Dordrecht (H.G.M.R.-L.), the Department of Obstetrics and Gynecology, Bravis Hospital, Roosendaal (C.C.M.T.), the Department of Obstetrics and Gynecology, Röpcke-Zweers Hospital, Hardenberg (M.K.), the Department of Obstetrics and Gynecology, Zaans Medical Center, Zaandam (A.B.H.), the Department of Obstetrics and Gynecology, Elkerliek Hospital, Helmond (A.P.G.), the Department of Reproductive Medicine, Maastricht University Medical Center, Maastricht (R.G.), the Department of Obstetrics and Gynecology, Canisius-Wilhelmina Hospital, Nijmegen (C.F.H.), the Department of Obstetrics and Gynecology, Wilhelmina Hospital, Assen (A.V.S.), the Department of Obstetrics and Gynecology, Jeroen Bosch Hospital, Den Bosch (J.-P.B.), the Department of Obstetrics and Gynecology, Westfriesgasthuis, Hoorn (J.A.M.B.), the Department of Obstetrics and Gynecology, Hospital Gelderse Vallei, Ede (E.S.), the Department of Obstetrics and Gynecology, Amstelland Hospital, Amstelveen (A.M.), the Department of Obstetrics and Gynecology, Scheper Hospital, Emmen (M.J.P.), the Department of Obstetrics and Gynecology, Gelre Hospital, Apeldoorn (M.A.F.T.), the Department of Obstetrics and Gynecology, Sint Franciscus Hospital, Rotterdam (M.H.A.H.), the Department of Obstetrics and Gynecology, Diaconessenhuis (G.A.U.), and the Department of Medical Statistics and Bioinformatics, Leiden University Medical Center (N.G.), Leiden, and the Department of Obstetrics and Gynecology, Tergooi Hospital, Blaricum (C.H.K.) - all in the Netherlands; and the School of Medicine, Robinson Research Institute, University of Adelaide, and the South Australian Health and Medical Research Institute, Adelaide, SA, Australia (B.W.J.M.)
| | - Alexander V Sluijmer
- From the Department of Reproductive Medicine (K.D., J.R., V.M., P.G.A.H.) and the Department of Epidemiology and Biostatistics (J.W.R.T.), VU University Medical Center, the Center for Reproductive Medicine, Department of Obstetrics and Gynecology, Academic Medical Center (M.G.), the Department of Obstetrics and Gynecology, Onze Lieve Vrouwe Gasthuis (H.R.V.), and the Department of Obstetrics and Gynecology, Slotervaart Medical Center (A.E.J.D.), Amsterdam, and the Department of Obstetrics and Gynecology, TweeSteden Hospital (I.A.J.R.), and the Department of Obstetrics and Gynecology, Sint Elisabeth Hospital (J.M.J.S.), Tilburg, the Department of Reproductive Medicine and Gynecology, University of Groningen, University Medical Center Groningen, Groningen (A.H.), the Department of Obstetrics and Gynecology, VieCuri Medical Center, Venlo (P.B.), the Department of Obstetrics and Gynecology, Rijnstate Hospital, Arnhem (A.W.N.), the Department of Obstetrics and Gynecology, Albert Schweitzer Hospital, Dordrecht (H.G.M.R.-L.), the Department of Obstetrics and Gynecology, Bravis Hospital, Roosendaal (C.C.M.T.), the Department of Obstetrics and Gynecology, Röpcke-Zweers Hospital, Hardenberg (M.K.), the Department of Obstetrics and Gynecology, Zaans Medical Center, Zaandam (A.B.H.), the Department of Obstetrics and Gynecology, Elkerliek Hospital, Helmond (A.P.G.), the Department of Reproductive Medicine, Maastricht University Medical Center, Maastricht (R.G.), the Department of Obstetrics and Gynecology, Canisius-Wilhelmina Hospital, Nijmegen (C.F.H.), the Department of Obstetrics and Gynecology, Wilhelmina Hospital, Assen (A.V.S.), the Department of Obstetrics and Gynecology, Jeroen Bosch Hospital, Den Bosch (J.-P.B.), the Department of Obstetrics and Gynecology, Westfriesgasthuis, Hoorn (J.A.M.B.), the Department of Obstetrics and Gynecology, Hospital Gelderse Vallei, Ede (E.S.), the Department of Obstetrics and Gynecology, Amstelland Hospital, Amstelveen (A.M.), the Department of Obstetrics and Gynecology, Scheper Hospital, Emmen (M.J.P.), the Department of Obstetrics and Gynecology, Gelre Hospital, Apeldoorn (M.A.F.T.), the Department of Obstetrics and Gynecology, Sint Franciscus Hospital, Rotterdam (M.H.A.H.), the Department of Obstetrics and Gynecology, Diaconessenhuis (G.A.U.), and the Department of Medical Statistics and Bioinformatics, Leiden University Medical Center (N.G.), Leiden, and the Department of Obstetrics and Gynecology, Tergooi Hospital, Blaricum (C.H.K.) - all in the Netherlands; and the School of Medicine, Robinson Research Institute, University of Adelaide, and the South Australian Health and Medical Research Institute, Adelaide, SA, Australia (B.W.J.M.)
| | - Jan-Peter de Bruin
- From the Department of Reproductive Medicine (K.D., J.R., V.M., P.G.A.H.) and the Department of Epidemiology and Biostatistics (J.W.R.T.), VU University Medical Center, the Center for Reproductive Medicine, Department of Obstetrics and Gynecology, Academic Medical Center (M.G.), the Department of Obstetrics and Gynecology, Onze Lieve Vrouwe Gasthuis (H.R.V.), and the Department of Obstetrics and Gynecology, Slotervaart Medical Center (A.E.J.D.), Amsterdam, and the Department of Obstetrics and Gynecology, TweeSteden Hospital (I.A.J.R.), and the Department of Obstetrics and Gynecology, Sint Elisabeth Hospital (J.M.J.S.), Tilburg, the Department of Reproductive Medicine and Gynecology, University of Groningen, University Medical Center Groningen, Groningen (A.H.), the Department of Obstetrics and Gynecology, VieCuri Medical Center, Venlo (P.B.), the Department of Obstetrics and Gynecology, Rijnstate Hospital, Arnhem (A.W.N.), the Department of Obstetrics and Gynecology, Albert Schweitzer Hospital, Dordrecht (H.G.M.R.-L.), the Department of Obstetrics and Gynecology, Bravis Hospital, Roosendaal (C.C.M.T.), the Department of Obstetrics and Gynecology, Röpcke-Zweers Hospital, Hardenberg (M.K.), the Department of Obstetrics and Gynecology, Zaans Medical Center, Zaandam (A.B.H.), the Department of Obstetrics and Gynecology, Elkerliek Hospital, Helmond (A.P.G.), the Department of Reproductive Medicine, Maastricht University Medical Center, Maastricht (R.G.), the Department of Obstetrics and Gynecology, Canisius-Wilhelmina Hospital, Nijmegen (C.F.H.), the Department of Obstetrics and Gynecology, Wilhelmina Hospital, Assen (A.V.S.), the Department of Obstetrics and Gynecology, Jeroen Bosch Hospital, Den Bosch (J.-P.B.), the Department of Obstetrics and Gynecology, Westfriesgasthuis, Hoorn (J.A.M.B.), the Department of Obstetrics and Gynecology, Hospital Gelderse Vallei, Ede (E.S.), the Department of Obstetrics and Gynecology, Amstelland Hospital, Amstelveen (A.M.), the Department of Obstetrics and Gynecology, Scheper Hospital, Emmen (M.J.P.), the Department of Obstetrics and Gynecology, Gelre Hospital, Apeldoorn (M.A.F.T.), the Department of Obstetrics and Gynecology, Sint Franciscus Hospital, Rotterdam (M.H.A.H.), the Department of Obstetrics and Gynecology, Diaconessenhuis (G.A.U.), and the Department of Medical Statistics and Bioinformatics, Leiden University Medical Center (N.G.), Leiden, and the Department of Obstetrics and Gynecology, Tergooi Hospital, Blaricum (C.H.K.) - all in the Netherlands; and the School of Medicine, Robinson Research Institute, University of Adelaide, and the South Australian Health and Medical Research Institute, Adelaide, SA, Australia (B.W.J.M.)
| | - Jesper M J Smeenk
- From the Department of Reproductive Medicine (K.D., J.R., V.M., P.G.A.H.) and the Department of Epidemiology and Biostatistics (J.W.R.T.), VU University Medical Center, the Center for Reproductive Medicine, Department of Obstetrics and Gynecology, Academic Medical Center (M.G.), the Department of Obstetrics and Gynecology, Onze Lieve Vrouwe Gasthuis (H.R.V.), and the Department of Obstetrics and Gynecology, Slotervaart Medical Center (A.E.J.D.), Amsterdam, and the Department of Obstetrics and Gynecology, TweeSteden Hospital (I.A.J.R.), and the Department of Obstetrics and Gynecology, Sint Elisabeth Hospital (J.M.J.S.), Tilburg, the Department of Reproductive Medicine and Gynecology, University of Groningen, University Medical Center Groningen, Groningen (A.H.), the Department of Obstetrics and Gynecology, VieCuri Medical Center, Venlo (P.B.), the Department of Obstetrics and Gynecology, Rijnstate Hospital, Arnhem (A.W.N.), the Department of Obstetrics and Gynecology, Albert Schweitzer Hospital, Dordrecht (H.G.M.R.-L.), the Department of Obstetrics and Gynecology, Bravis Hospital, Roosendaal (C.C.M.T.), the Department of Obstetrics and Gynecology, Röpcke-Zweers Hospital, Hardenberg (M.K.), the Department of Obstetrics and Gynecology, Zaans Medical Center, Zaandam (A.B.H.), the Department of Obstetrics and Gynecology, Elkerliek Hospital, Helmond (A.P.G.), the Department of Reproductive Medicine, Maastricht University Medical Center, Maastricht (R.G.), the Department of Obstetrics and Gynecology, Canisius-Wilhelmina Hospital, Nijmegen (C.F.H.), the Department of Obstetrics and Gynecology, Wilhelmina Hospital, Assen (A.V.S.), the Department of Obstetrics and Gynecology, Jeroen Bosch Hospital, Den Bosch (J.-P.B.), the Department of Obstetrics and Gynecology, Westfriesgasthuis, Hoorn (J.A.M.B.), the Department of Obstetrics and Gynecology, Hospital Gelderse Vallei, Ede (E.S.), the Department of Obstetrics and Gynecology, Amstelland Hospital, Amstelveen (A.M.), the Department of Obstetrics and Gynecology, Scheper Hospital, Emmen (M.J.P.), the Department of Obstetrics and Gynecology, Gelre Hospital, Apeldoorn (M.A.F.T.), the Department of Obstetrics and Gynecology, Sint Franciscus Hospital, Rotterdam (M.H.A.H.), the Department of Obstetrics and Gynecology, Diaconessenhuis (G.A.U.), and the Department of Medical Statistics and Bioinformatics, Leiden University Medical Center (N.G.), Leiden, and the Department of Obstetrics and Gynecology, Tergooi Hospital, Blaricum (C.H.K.) - all in the Netherlands; and the School of Medicine, Robinson Research Institute, University of Adelaide, and the South Australian Health and Medical Research Institute, Adelaide, SA, Australia (B.W.J.M.)
| | - Jacoba A M de Boer
- From the Department of Reproductive Medicine (K.D., J.R., V.M., P.G.A.H.) and the Department of Epidemiology and Biostatistics (J.W.R.T.), VU University Medical Center, the Center for Reproductive Medicine, Department of Obstetrics and Gynecology, Academic Medical Center (M.G.), the Department of Obstetrics and Gynecology, Onze Lieve Vrouwe Gasthuis (H.R.V.), and the Department of Obstetrics and Gynecology, Slotervaart Medical Center (A.E.J.D.), Amsterdam, and the Department of Obstetrics and Gynecology, TweeSteden Hospital (I.A.J.R.), and the Department of Obstetrics and Gynecology, Sint Elisabeth Hospital (J.M.J.S.), Tilburg, the Department of Reproductive Medicine and Gynecology, University of Groningen, University Medical Center Groningen, Groningen (A.H.), the Department of Obstetrics and Gynecology, VieCuri Medical Center, Venlo (P.B.), the Department of Obstetrics and Gynecology, Rijnstate Hospital, Arnhem (A.W.N.), the Department of Obstetrics and Gynecology, Albert Schweitzer Hospital, Dordrecht (H.G.M.R.-L.), the Department of Obstetrics and Gynecology, Bravis Hospital, Roosendaal (C.C.M.T.), the Department of Obstetrics and Gynecology, Röpcke-Zweers Hospital, Hardenberg (M.K.), the Department of Obstetrics and Gynecology, Zaans Medical Center, Zaandam (A.B.H.), the Department of Obstetrics and Gynecology, Elkerliek Hospital, Helmond (A.P.G.), the Department of Reproductive Medicine, Maastricht University Medical Center, Maastricht (R.G.), the Department of Obstetrics and Gynecology, Canisius-Wilhelmina Hospital, Nijmegen (C.F.H.), the Department of Obstetrics and Gynecology, Wilhelmina Hospital, Assen (A.V.S.), the Department of Obstetrics and Gynecology, Jeroen Bosch Hospital, Den Bosch (J.-P.B.), the Department of Obstetrics and Gynecology, Westfriesgasthuis, Hoorn (J.A.M.B.), the Department of Obstetrics and Gynecology, Hospital Gelderse Vallei, Ede (E.S.), the Department of Obstetrics and Gynecology, Amstelland Hospital, Amstelveen (A.M.), the Department of Obstetrics and Gynecology, Scheper Hospital, Emmen (M.J.P.), the Department of Obstetrics and Gynecology, Gelre Hospital, Apeldoorn (M.A.F.T.), the Department of Obstetrics and Gynecology, Sint Franciscus Hospital, Rotterdam (M.H.A.H.), the Department of Obstetrics and Gynecology, Diaconessenhuis (G.A.U.), and the Department of Medical Statistics and Bioinformatics, Leiden University Medical Center (N.G.), Leiden, and the Department of Obstetrics and Gynecology, Tergooi Hospital, Blaricum (C.H.K.) - all in the Netherlands; and the School of Medicine, Robinson Research Institute, University of Adelaide, and the South Australian Health and Medical Research Institute, Adelaide, SA, Australia (B.W.J.M.)
| | - Eduard Scheenjes
- From the Department of Reproductive Medicine (K.D., J.R., V.M., P.G.A.H.) and the Department of Epidemiology and Biostatistics (J.W.R.T.), VU University Medical Center, the Center for Reproductive Medicine, Department of Obstetrics and Gynecology, Academic Medical Center (M.G.), the Department of Obstetrics and Gynecology, Onze Lieve Vrouwe Gasthuis (H.R.V.), and the Department of Obstetrics and Gynecology, Slotervaart Medical Center (A.E.J.D.), Amsterdam, and the Department of Obstetrics and Gynecology, TweeSteden Hospital (I.A.J.R.), and the Department of Obstetrics and Gynecology, Sint Elisabeth Hospital (J.M.J.S.), Tilburg, the Department of Reproductive Medicine and Gynecology, University of Groningen, University Medical Center Groningen, Groningen (A.H.), the Department of Obstetrics and Gynecology, VieCuri Medical Center, Venlo (P.B.), the Department of Obstetrics and Gynecology, Rijnstate Hospital, Arnhem (A.W.N.), the Department of Obstetrics and Gynecology, Albert Schweitzer Hospital, Dordrecht (H.G.M.R.-L.), the Department of Obstetrics and Gynecology, Bravis Hospital, Roosendaal (C.C.M.T.), the Department of Obstetrics and Gynecology, Röpcke-Zweers Hospital, Hardenberg (M.K.), the Department of Obstetrics and Gynecology, Zaans Medical Center, Zaandam (A.B.H.), the Department of Obstetrics and Gynecology, Elkerliek Hospital, Helmond (A.P.G.), the Department of Reproductive Medicine, Maastricht University Medical Center, Maastricht (R.G.), the Department of Obstetrics and Gynecology, Canisius-Wilhelmina Hospital, Nijmegen (C.F.H.), the Department of Obstetrics and Gynecology, Wilhelmina Hospital, Assen (A.V.S.), the Department of Obstetrics and Gynecology, Jeroen Bosch Hospital, Den Bosch (J.-P.B.), the Department of Obstetrics and Gynecology, Westfriesgasthuis, Hoorn (J.A.M.B.), the Department of Obstetrics and Gynecology, Hospital Gelderse Vallei, Ede (E.S.), the Department of Obstetrics and Gynecology, Amstelland Hospital, Amstelveen (A.M.), the Department of Obstetrics and Gynecology, Scheper Hospital, Emmen (M.J.P.), the Department of Obstetrics and Gynecology, Gelre Hospital, Apeldoorn (M.A.F.T.), the Department of Obstetrics and Gynecology, Sint Franciscus Hospital, Rotterdam (M.H.A.H.), the Department of Obstetrics and Gynecology, Diaconessenhuis (G.A.U.), and the Department of Medical Statistics and Bioinformatics, Leiden University Medical Center (N.G.), Leiden, and the Department of Obstetrics and Gynecology, Tergooi Hospital, Blaricum (C.H.K.) - all in the Netherlands; and the School of Medicine, Robinson Research Institute, University of Adelaide, and the South Australian Health and Medical Research Institute, Adelaide, SA, Australia (B.W.J.M.)
| | - Annette E J Duijn
- From the Department of Reproductive Medicine (K.D., J.R., V.M., P.G.A.H.) and the Department of Epidemiology and Biostatistics (J.W.R.T.), VU University Medical Center, the Center for Reproductive Medicine, Department of Obstetrics and Gynecology, Academic Medical Center (M.G.), the Department of Obstetrics and Gynecology, Onze Lieve Vrouwe Gasthuis (H.R.V.), and the Department of Obstetrics and Gynecology, Slotervaart Medical Center (A.E.J.D.), Amsterdam, and the Department of Obstetrics and Gynecology, TweeSteden Hospital (I.A.J.R.), and the Department of Obstetrics and Gynecology, Sint Elisabeth Hospital (J.M.J.S.), Tilburg, the Department of Reproductive Medicine and Gynecology, University of Groningen, University Medical Center Groningen, Groningen (A.H.), the Department of Obstetrics and Gynecology, VieCuri Medical Center, Venlo (P.B.), the Department of Obstetrics and Gynecology, Rijnstate Hospital, Arnhem (A.W.N.), the Department of Obstetrics and Gynecology, Albert Schweitzer Hospital, Dordrecht (H.G.M.R.-L.), the Department of Obstetrics and Gynecology, Bravis Hospital, Roosendaal (C.C.M.T.), the Department of Obstetrics and Gynecology, Röpcke-Zweers Hospital, Hardenberg (M.K.), the Department of Obstetrics and Gynecology, Zaans Medical Center, Zaandam (A.B.H.), the Department of Obstetrics and Gynecology, Elkerliek Hospital, Helmond (A.P.G.), the Department of Reproductive Medicine, Maastricht University Medical Center, Maastricht (R.G.), the Department of Obstetrics and Gynecology, Canisius-Wilhelmina Hospital, Nijmegen (C.F.H.), the Department of Obstetrics and Gynecology, Wilhelmina Hospital, Assen (A.V.S.), the Department of Obstetrics and Gynecology, Jeroen Bosch Hospital, Den Bosch (J.-P.B.), the Department of Obstetrics and Gynecology, Westfriesgasthuis, Hoorn (J.A.M.B.), the Department of Obstetrics and Gynecology, Hospital Gelderse Vallei, Ede (E.S.), the Department of Obstetrics and Gynecology, Amstelland Hospital, Amstelveen (A.M.), the Department of Obstetrics and Gynecology, Scheper Hospital, Emmen (M.J.P.), the Department of Obstetrics and Gynecology, Gelre Hospital, Apeldoorn (M.A.F.T.), the Department of Obstetrics and Gynecology, Sint Franciscus Hospital, Rotterdam (M.H.A.H.), the Department of Obstetrics and Gynecology, Diaconessenhuis (G.A.U.), and the Department of Medical Statistics and Bioinformatics, Leiden University Medical Center (N.G.), Leiden, and the Department of Obstetrics and Gynecology, Tergooi Hospital, Blaricum (C.H.K.) - all in the Netherlands; and the School of Medicine, Robinson Research Institute, University of Adelaide, and the South Australian Health and Medical Research Institute, Adelaide, SA, Australia (B.W.J.M.)
| | - Alexander Mozes
- From the Department of Reproductive Medicine (K.D., J.R., V.M., P.G.A.H.) and the Department of Epidemiology and Biostatistics (J.W.R.T.), VU University Medical Center, the Center for Reproductive Medicine, Department of Obstetrics and Gynecology, Academic Medical Center (M.G.), the Department of Obstetrics and Gynecology, Onze Lieve Vrouwe Gasthuis (H.R.V.), and the Department of Obstetrics and Gynecology, Slotervaart Medical Center (A.E.J.D.), Amsterdam, and the Department of Obstetrics and Gynecology, TweeSteden Hospital (I.A.J.R.), and the Department of Obstetrics and Gynecology, Sint Elisabeth Hospital (J.M.J.S.), Tilburg, the Department of Reproductive Medicine and Gynecology, University of Groningen, University Medical Center Groningen, Groningen (A.H.), the Department of Obstetrics and Gynecology, VieCuri Medical Center, Venlo (P.B.), the Department of Obstetrics and Gynecology, Rijnstate Hospital, Arnhem (A.W.N.), the Department of Obstetrics and Gynecology, Albert Schweitzer Hospital, Dordrecht (H.G.M.R.-L.), the Department of Obstetrics and Gynecology, Bravis Hospital, Roosendaal (C.C.M.T.), the Department of Obstetrics and Gynecology, Röpcke-Zweers Hospital, Hardenberg (M.K.), the Department of Obstetrics and Gynecology, Zaans Medical Center, Zaandam (A.B.H.), the Department of Obstetrics and Gynecology, Elkerliek Hospital, Helmond (A.P.G.), the Department of Reproductive Medicine, Maastricht University Medical Center, Maastricht (R.G.), the Department of Obstetrics and Gynecology, Canisius-Wilhelmina Hospital, Nijmegen (C.F.H.), the Department of Obstetrics and Gynecology, Wilhelmina Hospital, Assen (A.V.S.), the Department of Obstetrics and Gynecology, Jeroen Bosch Hospital, Den Bosch (J.-P.B.), the Department of Obstetrics and Gynecology, Westfriesgasthuis, Hoorn (J.A.M.B.), the Department of Obstetrics and Gynecology, Hospital Gelderse Vallei, Ede (E.S.), the Department of Obstetrics and Gynecology, Amstelland Hospital, Amstelveen (A.M.), the Department of Obstetrics and Gynecology, Scheper Hospital, Emmen (M.J.P.), the Department of Obstetrics and Gynecology, Gelre Hospital, Apeldoorn (M.A.F.T.), the Department of Obstetrics and Gynecology, Sint Franciscus Hospital, Rotterdam (M.H.A.H.), the Department of Obstetrics and Gynecology, Diaconessenhuis (G.A.U.), and the Department of Medical Statistics and Bioinformatics, Leiden University Medical Center (N.G.), Leiden, and the Department of Obstetrics and Gynecology, Tergooi Hospital, Blaricum (C.H.K.) - all in the Netherlands; and the School of Medicine, Robinson Research Institute, University of Adelaide, and the South Australian Health and Medical Research Institute, Adelaide, SA, Australia (B.W.J.M.)
| | - Marie J Pelinck
- From the Department of Reproductive Medicine (K.D., J.R., V.M., P.G.A.H.) and the Department of Epidemiology and Biostatistics (J.W.R.T.), VU University Medical Center, the Center for Reproductive Medicine, Department of Obstetrics and Gynecology, Academic Medical Center (M.G.), the Department of Obstetrics and Gynecology, Onze Lieve Vrouwe Gasthuis (H.R.V.), and the Department of Obstetrics and Gynecology, Slotervaart Medical Center (A.E.J.D.), Amsterdam, and the Department of Obstetrics and Gynecology, TweeSteden Hospital (I.A.J.R.), and the Department of Obstetrics and Gynecology, Sint Elisabeth Hospital (J.M.J.S.), Tilburg, the Department of Reproductive Medicine and Gynecology, University of Groningen, University Medical Center Groningen, Groningen (A.H.), the Department of Obstetrics and Gynecology, VieCuri Medical Center, Venlo (P.B.), the Department of Obstetrics and Gynecology, Rijnstate Hospital, Arnhem (A.W.N.), the Department of Obstetrics and Gynecology, Albert Schweitzer Hospital, Dordrecht (H.G.M.R.-L.), the Department of Obstetrics and Gynecology, Bravis Hospital, Roosendaal (C.C.M.T.), the Department of Obstetrics and Gynecology, Röpcke-Zweers Hospital, Hardenberg (M.K.), the Department of Obstetrics and Gynecology, Zaans Medical Center, Zaandam (A.B.H.), the Department of Obstetrics and Gynecology, Elkerliek Hospital, Helmond (A.P.G.), the Department of Reproductive Medicine, Maastricht University Medical Center, Maastricht (R.G.), the Department of Obstetrics and Gynecology, Canisius-Wilhelmina Hospital, Nijmegen (C.F.H.), the Department of Obstetrics and Gynecology, Wilhelmina Hospital, Assen (A.V.S.), the Department of Obstetrics and Gynecology, Jeroen Bosch Hospital, Den Bosch (J.-P.B.), the Department of Obstetrics and Gynecology, Westfriesgasthuis, Hoorn (J.A.M.B.), the Department of Obstetrics and Gynecology, Hospital Gelderse Vallei, Ede (E.S.), the Department of Obstetrics and Gynecology, Amstelland Hospital, Amstelveen (A.M.), the Department of Obstetrics and Gynecology, Scheper Hospital, Emmen (M.J.P.), the Department of Obstetrics and Gynecology, Gelre Hospital, Apeldoorn (M.A.F.T.), the Department of Obstetrics and Gynecology, Sint Franciscus Hospital, Rotterdam (M.H.A.H.), the Department of Obstetrics and Gynecology, Diaconessenhuis (G.A.U.), and the Department of Medical Statistics and Bioinformatics, Leiden University Medical Center (N.G.), Leiden, and the Department of Obstetrics and Gynecology, Tergooi Hospital, Blaricum (C.H.K.) - all in the Netherlands; and the School of Medicine, Robinson Research Institute, University of Adelaide, and the South Australian Health and Medical Research Institute, Adelaide, SA, Australia (B.W.J.M.)
| | - Maaike A F Traas
- From the Department of Reproductive Medicine (K.D., J.R., V.M., P.G.A.H.) and the Department of Epidemiology and Biostatistics (J.W.R.T.), VU University Medical Center, the Center for Reproductive Medicine, Department of Obstetrics and Gynecology, Academic Medical Center (M.G.), the Department of Obstetrics and Gynecology, Onze Lieve Vrouwe Gasthuis (H.R.V.), and the Department of Obstetrics and Gynecology, Slotervaart Medical Center (A.E.J.D.), Amsterdam, and the Department of Obstetrics and Gynecology, TweeSteden Hospital (I.A.J.R.), and the Department of Obstetrics and Gynecology, Sint Elisabeth Hospital (J.M.J.S.), Tilburg, the Department of Reproductive Medicine and Gynecology, University of Groningen, University Medical Center Groningen, Groningen (A.H.), the Department of Obstetrics and Gynecology, VieCuri Medical Center, Venlo (P.B.), the Department of Obstetrics and Gynecology, Rijnstate Hospital, Arnhem (A.W.N.), the Department of Obstetrics and Gynecology, Albert Schweitzer Hospital, Dordrecht (H.G.M.R.-L.), the Department of Obstetrics and Gynecology, Bravis Hospital, Roosendaal (C.C.M.T.), the Department of Obstetrics and Gynecology, Röpcke-Zweers Hospital, Hardenberg (M.K.), the Department of Obstetrics and Gynecology, Zaans Medical Center, Zaandam (A.B.H.), the Department of Obstetrics and Gynecology, Elkerliek Hospital, Helmond (A.P.G.), the Department of Reproductive Medicine, Maastricht University Medical Center, Maastricht (R.G.), the Department of Obstetrics and Gynecology, Canisius-Wilhelmina Hospital, Nijmegen (C.F.H.), the Department of Obstetrics and Gynecology, Wilhelmina Hospital, Assen (A.V.S.), the Department of Obstetrics and Gynecology, Jeroen Bosch Hospital, Den Bosch (J.-P.B.), the Department of Obstetrics and Gynecology, Westfriesgasthuis, Hoorn (J.A.M.B.), the Department of Obstetrics and Gynecology, Hospital Gelderse Vallei, Ede (E.S.), the Department of Obstetrics and Gynecology, Amstelland Hospital, Amstelveen (A.M.), the Department of Obstetrics and Gynecology, Scheper Hospital, Emmen (M.J.P.), the Department of Obstetrics and Gynecology, Gelre Hospital, Apeldoorn (M.A.F.T.), the Department of Obstetrics and Gynecology, Sint Franciscus Hospital, Rotterdam (M.H.A.H.), the Department of Obstetrics and Gynecology, Diaconessenhuis (G.A.U.), and the Department of Medical Statistics and Bioinformatics, Leiden University Medical Center (N.G.), Leiden, and the Department of Obstetrics and Gynecology, Tergooi Hospital, Blaricum (C.H.K.) - all in the Netherlands; and the School of Medicine, Robinson Research Institute, University of Adelaide, and the South Australian Health and Medical Research Institute, Adelaide, SA, Australia (B.W.J.M.)
| | - Machiel H A van Hooff
- From the Department of Reproductive Medicine (K.D., J.R., V.M., P.G.A.H.) and the Department of Epidemiology and Biostatistics (J.W.R.T.), VU University Medical Center, the Center for Reproductive Medicine, Department of Obstetrics and Gynecology, Academic Medical Center (M.G.), the Department of Obstetrics and Gynecology, Onze Lieve Vrouwe Gasthuis (H.R.V.), and the Department of Obstetrics and Gynecology, Slotervaart Medical Center (A.E.J.D.), Amsterdam, and the Department of Obstetrics and Gynecology, TweeSteden Hospital (I.A.J.R.), and the Department of Obstetrics and Gynecology, Sint Elisabeth Hospital (J.M.J.S.), Tilburg, the Department of Reproductive Medicine and Gynecology, University of Groningen, University Medical Center Groningen, Groningen (A.H.), the Department of Obstetrics and Gynecology, VieCuri Medical Center, Venlo (P.B.), the Department of Obstetrics and Gynecology, Rijnstate Hospital, Arnhem (A.W.N.), the Department of Obstetrics and Gynecology, Albert Schweitzer Hospital, Dordrecht (H.G.M.R.-L.), the Department of Obstetrics and Gynecology, Bravis Hospital, Roosendaal (C.C.M.T.), the Department of Obstetrics and Gynecology, Röpcke-Zweers Hospital, Hardenberg (M.K.), the Department of Obstetrics and Gynecology, Zaans Medical Center, Zaandam (A.B.H.), the Department of Obstetrics and Gynecology, Elkerliek Hospital, Helmond (A.P.G.), the Department of Reproductive Medicine, Maastricht University Medical Center, Maastricht (R.G.), the Department of Obstetrics and Gynecology, Canisius-Wilhelmina Hospital, Nijmegen (C.F.H.), the Department of Obstetrics and Gynecology, Wilhelmina Hospital, Assen (A.V.S.), the Department of Obstetrics and Gynecology, Jeroen Bosch Hospital, Den Bosch (J.-P.B.), the Department of Obstetrics and Gynecology, Westfriesgasthuis, Hoorn (J.A.M.B.), the Department of Obstetrics and Gynecology, Hospital Gelderse Vallei, Ede (E.S.), the Department of Obstetrics and Gynecology, Amstelland Hospital, Amstelveen (A.M.), the Department of Obstetrics and Gynecology, Scheper Hospital, Emmen (M.J.P.), the Department of Obstetrics and Gynecology, Gelre Hospital, Apeldoorn (M.A.F.T.), the Department of Obstetrics and Gynecology, Sint Franciscus Hospital, Rotterdam (M.H.A.H.), the Department of Obstetrics and Gynecology, Diaconessenhuis (G.A.U.), and the Department of Medical Statistics and Bioinformatics, Leiden University Medical Center (N.G.), Leiden, and the Department of Obstetrics and Gynecology, Tergooi Hospital, Blaricum (C.H.K.) - all in the Netherlands; and the School of Medicine, Robinson Research Institute, University of Adelaide, and the South Australian Health and Medical Research Institute, Adelaide, SA, Australia (B.W.J.M.)
| | - Gijsbertus A van Unnik
- From the Department of Reproductive Medicine (K.D., J.R., V.M., P.G.A.H.) and the Department of Epidemiology and Biostatistics (J.W.R.T.), VU University Medical Center, the Center for Reproductive Medicine, Department of Obstetrics and Gynecology, Academic Medical Center (M.G.), the Department of Obstetrics and Gynecology, Onze Lieve Vrouwe Gasthuis (H.R.V.), and the Department of Obstetrics and Gynecology, Slotervaart Medical Center (A.E.J.D.), Amsterdam, and the Department of Obstetrics and Gynecology, TweeSteden Hospital (I.A.J.R.), and the Department of Obstetrics and Gynecology, Sint Elisabeth Hospital (J.M.J.S.), Tilburg, the Department of Reproductive Medicine and Gynecology, University of Groningen, University Medical Center Groningen, Groningen (A.H.), the Department of Obstetrics and Gynecology, VieCuri Medical Center, Venlo (P.B.), the Department of Obstetrics and Gynecology, Rijnstate Hospital, Arnhem (A.W.N.), the Department of Obstetrics and Gynecology, Albert Schweitzer Hospital, Dordrecht (H.G.M.R.-L.), the Department of Obstetrics and Gynecology, Bravis Hospital, Roosendaal (C.C.M.T.), the Department of Obstetrics and Gynecology, Röpcke-Zweers Hospital, Hardenberg (M.K.), the Department of Obstetrics and Gynecology, Zaans Medical Center, Zaandam (A.B.H.), the Department of Obstetrics and Gynecology, Elkerliek Hospital, Helmond (A.P.G.), the Department of Reproductive Medicine, Maastricht University Medical Center, Maastricht (R.G.), the Department of Obstetrics and Gynecology, Canisius-Wilhelmina Hospital, Nijmegen (C.F.H.), the Department of Obstetrics and Gynecology, Wilhelmina Hospital, Assen (A.V.S.), the Department of Obstetrics and Gynecology, Jeroen Bosch Hospital, Den Bosch (J.-P.B.), the Department of Obstetrics and Gynecology, Westfriesgasthuis, Hoorn (J.A.M.B.), the Department of Obstetrics and Gynecology, Hospital Gelderse Vallei, Ede (E.S.), the Department of Obstetrics and Gynecology, Amstelland Hospital, Amstelveen (A.M.), the Department of Obstetrics and Gynecology, Scheper Hospital, Emmen (M.J.P.), the Department of Obstetrics and Gynecology, Gelre Hospital, Apeldoorn (M.A.F.T.), the Department of Obstetrics and Gynecology, Sint Franciscus Hospital, Rotterdam (M.H.A.H.), the Department of Obstetrics and Gynecology, Diaconessenhuis (G.A.U.), and the Department of Medical Statistics and Bioinformatics, Leiden University Medical Center (N.G.), Leiden, and the Department of Obstetrics and Gynecology, Tergooi Hospital, Blaricum (C.H.K.) - all in the Netherlands; and the School of Medicine, Robinson Research Institute, University of Adelaide, and the South Australian Health and Medical Research Institute, Adelaide, SA, Australia (B.W.J.M.)
| | - Cornelia H de Koning
- From the Department of Reproductive Medicine (K.D., J.R., V.M., P.G.A.H.) and the Department of Epidemiology and Biostatistics (J.W.R.T.), VU University Medical Center, the Center for Reproductive Medicine, Department of Obstetrics and Gynecology, Academic Medical Center (M.G.), the Department of Obstetrics and Gynecology, Onze Lieve Vrouwe Gasthuis (H.R.V.), and the Department of Obstetrics and Gynecology, Slotervaart Medical Center (A.E.J.D.), Amsterdam, and the Department of Obstetrics and Gynecology, TweeSteden Hospital (I.A.J.R.), and the Department of Obstetrics and Gynecology, Sint Elisabeth Hospital (J.M.J.S.), Tilburg, the Department of Reproductive Medicine and Gynecology, University of Groningen, University Medical Center Groningen, Groningen (A.H.), the Department of Obstetrics and Gynecology, VieCuri Medical Center, Venlo (P.B.), the Department of Obstetrics and Gynecology, Rijnstate Hospital, Arnhem (A.W.N.), the Department of Obstetrics and Gynecology, Albert Schweitzer Hospital, Dordrecht (H.G.M.R.-L.), the Department of Obstetrics and Gynecology, Bravis Hospital, Roosendaal (C.C.M.T.), the Department of Obstetrics and Gynecology, Röpcke-Zweers Hospital, Hardenberg (M.K.), the Department of Obstetrics and Gynecology, Zaans Medical Center, Zaandam (A.B.H.), the Department of Obstetrics and Gynecology, Elkerliek Hospital, Helmond (A.P.G.), the Department of Reproductive Medicine, Maastricht University Medical Center, Maastricht (R.G.), the Department of Obstetrics and Gynecology, Canisius-Wilhelmina Hospital, Nijmegen (C.F.H.), the Department of Obstetrics and Gynecology, Wilhelmina Hospital, Assen (A.V.S.), the Department of Obstetrics and Gynecology, Jeroen Bosch Hospital, Den Bosch (J.-P.B.), the Department of Obstetrics and Gynecology, Westfriesgasthuis, Hoorn (J.A.M.B.), the Department of Obstetrics and Gynecology, Hospital Gelderse Vallei, Ede (E.S.), the Department of Obstetrics and Gynecology, Amstelland Hospital, Amstelveen (A.M.), the Department of Obstetrics and Gynecology, Scheper Hospital, Emmen (M.J.P.), the Department of Obstetrics and Gynecology, Gelre Hospital, Apeldoorn (M.A.F.T.), the Department of Obstetrics and Gynecology, Sint Franciscus Hospital, Rotterdam (M.H.A.H.), the Department of Obstetrics and Gynecology, Diaconessenhuis (G.A.U.), and the Department of Medical Statistics and Bioinformatics, Leiden University Medical Center (N.G.), Leiden, and the Department of Obstetrics and Gynecology, Tergooi Hospital, Blaricum (C.H.K.) - all in the Netherlands; and the School of Medicine, Robinson Research Institute, University of Adelaide, and the South Australian Health and Medical Research Institute, Adelaide, SA, Australia (B.W.J.M.)
| | - Nan van Geloven
- From the Department of Reproductive Medicine (K.D., J.R., V.M., P.G.A.H.) and the Department of Epidemiology and Biostatistics (J.W.R.T.), VU University Medical Center, the Center for Reproductive Medicine, Department of Obstetrics and Gynecology, Academic Medical Center (M.G.), the Department of Obstetrics and Gynecology, Onze Lieve Vrouwe Gasthuis (H.R.V.), and the Department of Obstetrics and Gynecology, Slotervaart Medical Center (A.E.J.D.), Amsterdam, and the Department of Obstetrics and Gynecology, TweeSteden Hospital (I.A.J.R.), and the Department of Obstetrics and Gynecology, Sint Elisabeth Hospital (J.M.J.S.), Tilburg, the Department of Reproductive Medicine and Gynecology, University of Groningen, University Medical Center Groningen, Groningen (A.H.), the Department of Obstetrics and Gynecology, VieCuri Medical Center, Venlo (P.B.), the Department of Obstetrics and Gynecology, Rijnstate Hospital, Arnhem (A.W.N.), the Department of Obstetrics and Gynecology, Albert Schweitzer Hospital, Dordrecht (H.G.M.R.-L.), the Department of Obstetrics and Gynecology, Bravis Hospital, Roosendaal (C.C.M.T.), the Department of Obstetrics and Gynecology, Röpcke-Zweers Hospital, Hardenberg (M.K.), the Department of Obstetrics and Gynecology, Zaans Medical Center, Zaandam (A.B.H.), the Department of Obstetrics and Gynecology, Elkerliek Hospital, Helmond (A.P.G.), the Department of Reproductive Medicine, Maastricht University Medical Center, Maastricht (R.G.), the Department of Obstetrics and Gynecology, Canisius-Wilhelmina Hospital, Nijmegen (C.F.H.), the Department of Obstetrics and Gynecology, Wilhelmina Hospital, Assen (A.V.S.), the Department of Obstetrics and Gynecology, Jeroen Bosch Hospital, Den Bosch (J.-P.B.), the Department of Obstetrics and Gynecology, Westfriesgasthuis, Hoorn (J.A.M.B.), the Department of Obstetrics and Gynecology, Hospital Gelderse Vallei, Ede (E.S.), the Department of Obstetrics and Gynecology, Amstelland Hospital, Amstelveen (A.M.), the Department of Obstetrics and Gynecology, Scheper Hospital, Emmen (M.J.P.), the Department of Obstetrics and Gynecology, Gelre Hospital, Apeldoorn (M.A.F.T.), the Department of Obstetrics and Gynecology, Sint Franciscus Hospital, Rotterdam (M.H.A.H.), the Department of Obstetrics and Gynecology, Diaconessenhuis (G.A.U.), and the Department of Medical Statistics and Bioinformatics, Leiden University Medical Center (N.G.), Leiden, and the Department of Obstetrics and Gynecology, Tergooi Hospital, Blaricum (C.H.K.) - all in the Netherlands; and the School of Medicine, Robinson Research Institute, University of Adelaide, and the South Australian Health and Medical Research Institute, Adelaide, SA, Australia (B.W.J.M.)
| | - Jos W R Twisk
- From the Department of Reproductive Medicine (K.D., J.R., V.M., P.G.A.H.) and the Department of Epidemiology and Biostatistics (J.W.R.T.), VU University Medical Center, the Center for Reproductive Medicine, Department of Obstetrics and Gynecology, Academic Medical Center (M.G.), the Department of Obstetrics and Gynecology, Onze Lieve Vrouwe Gasthuis (H.R.V.), and the Department of Obstetrics and Gynecology, Slotervaart Medical Center (A.E.J.D.), Amsterdam, and the Department of Obstetrics and Gynecology, TweeSteden Hospital (I.A.J.R.), and the Department of Obstetrics and Gynecology, Sint Elisabeth Hospital (J.M.J.S.), Tilburg, the Department of Reproductive Medicine and Gynecology, University of Groningen, University Medical Center Groningen, Groningen (A.H.), the Department of Obstetrics and Gynecology, VieCuri Medical Center, Venlo (P.B.), the Department of Obstetrics and Gynecology, Rijnstate Hospital, Arnhem (A.W.N.), the Department of Obstetrics and Gynecology, Albert Schweitzer Hospital, Dordrecht (H.G.M.R.-L.), the Department of Obstetrics and Gynecology, Bravis Hospital, Roosendaal (C.C.M.T.), the Department of Obstetrics and Gynecology, Röpcke-Zweers Hospital, Hardenberg (M.K.), the Department of Obstetrics and Gynecology, Zaans Medical Center, Zaandam (A.B.H.), the Department of Obstetrics and Gynecology, Elkerliek Hospital, Helmond (A.P.G.), the Department of Reproductive Medicine, Maastricht University Medical Center, Maastricht (R.G.), the Department of Obstetrics and Gynecology, Canisius-Wilhelmina Hospital, Nijmegen (C.F.H.), the Department of Obstetrics and Gynecology, Wilhelmina Hospital, Assen (A.V.S.), the Department of Obstetrics and Gynecology, Jeroen Bosch Hospital, Den Bosch (J.-P.B.), the Department of Obstetrics and Gynecology, Westfriesgasthuis, Hoorn (J.A.M.B.), the Department of Obstetrics and Gynecology, Hospital Gelderse Vallei, Ede (E.S.), the Department of Obstetrics and Gynecology, Amstelland Hospital, Amstelveen (A.M.), the Department of Obstetrics and Gynecology, Scheper Hospital, Emmen (M.J.P.), the Department of Obstetrics and Gynecology, Gelre Hospital, Apeldoorn (M.A.F.T.), the Department of Obstetrics and Gynecology, Sint Franciscus Hospital, Rotterdam (M.H.A.H.), the Department of Obstetrics and Gynecology, Diaconessenhuis (G.A.U.), and the Department of Medical Statistics and Bioinformatics, Leiden University Medical Center (N.G.), Leiden, and the Department of Obstetrics and Gynecology, Tergooi Hospital, Blaricum (C.H.K.) - all in the Netherlands; and the School of Medicine, Robinson Research Institute, University of Adelaide, and the South Australian Health and Medical Research Institute, Adelaide, SA, Australia (B.W.J.M.)
| | - Peter G A Hompes
- From the Department of Reproductive Medicine (K.D., J.R., V.M., P.G.A.H.) and the Department of Epidemiology and Biostatistics (J.W.R.T.), VU University Medical Center, the Center for Reproductive Medicine, Department of Obstetrics and Gynecology, Academic Medical Center (M.G.), the Department of Obstetrics and Gynecology, Onze Lieve Vrouwe Gasthuis (H.R.V.), and the Department of Obstetrics and Gynecology, Slotervaart Medical Center (A.E.J.D.), Amsterdam, and the Department of Obstetrics and Gynecology, TweeSteden Hospital (I.A.J.R.), and the Department of Obstetrics and Gynecology, Sint Elisabeth Hospital (J.M.J.S.), Tilburg, the Department of Reproductive Medicine and Gynecology, University of Groningen, University Medical Center Groningen, Groningen (A.H.), the Department of Obstetrics and Gynecology, VieCuri Medical Center, Venlo (P.B.), the Department of Obstetrics and Gynecology, Rijnstate Hospital, Arnhem (A.W.N.), the Department of Obstetrics and Gynecology, Albert Schweitzer Hospital, Dordrecht (H.G.M.R.-L.), the Department of Obstetrics and Gynecology, Bravis Hospital, Roosendaal (C.C.M.T.), the Department of Obstetrics and Gynecology, Röpcke-Zweers Hospital, Hardenberg (M.K.), the Department of Obstetrics and Gynecology, Zaans Medical Center, Zaandam (A.B.H.), the Department of Obstetrics and Gynecology, Elkerliek Hospital, Helmond (A.P.G.), the Department of Reproductive Medicine, Maastricht University Medical Center, Maastricht (R.G.), the Department of Obstetrics and Gynecology, Canisius-Wilhelmina Hospital, Nijmegen (C.F.H.), the Department of Obstetrics and Gynecology, Wilhelmina Hospital, Assen (A.V.S.), the Department of Obstetrics and Gynecology, Jeroen Bosch Hospital, Den Bosch (J.-P.B.), the Department of Obstetrics and Gynecology, Westfriesgasthuis, Hoorn (J.A.M.B.), the Department of Obstetrics and Gynecology, Hospital Gelderse Vallei, Ede (E.S.), the Department of Obstetrics and Gynecology, Amstelland Hospital, Amstelveen (A.M.), the Department of Obstetrics and Gynecology, Scheper Hospital, Emmen (M.J.P.), the Department of Obstetrics and Gynecology, Gelre Hospital, Apeldoorn (M.A.F.T.), the Department of Obstetrics and Gynecology, Sint Franciscus Hospital, Rotterdam (M.H.A.H.), the Department of Obstetrics and Gynecology, Diaconessenhuis (G.A.U.), and the Department of Medical Statistics and Bioinformatics, Leiden University Medical Center (N.G.), Leiden, and the Department of Obstetrics and Gynecology, Tergooi Hospital, Blaricum (C.H.K.) - all in the Netherlands; and the School of Medicine, Robinson Research Institute, University of Adelaide, and the South Australian Health and Medical Research Institute, Adelaide, SA, Australia (B.W.J.M.)
| | - Ben W J Mol
- From the Department of Reproductive Medicine (K.D., J.R., V.M., P.G.A.H.) and the Department of Epidemiology and Biostatistics (J.W.R.T.), VU University Medical Center, the Center for Reproductive Medicine, Department of Obstetrics and Gynecology, Academic Medical Center (M.G.), the Department of Obstetrics and Gynecology, Onze Lieve Vrouwe Gasthuis (H.R.V.), and the Department of Obstetrics and Gynecology, Slotervaart Medical Center (A.E.J.D.), Amsterdam, and the Department of Obstetrics and Gynecology, TweeSteden Hospital (I.A.J.R.), and the Department of Obstetrics and Gynecology, Sint Elisabeth Hospital (J.M.J.S.), Tilburg, the Department of Reproductive Medicine and Gynecology, University of Groningen, University Medical Center Groningen, Groningen (A.H.), the Department of Obstetrics and Gynecology, VieCuri Medical Center, Venlo (P.B.), the Department of Obstetrics and Gynecology, Rijnstate Hospital, Arnhem (A.W.N.), the Department of Obstetrics and Gynecology, Albert Schweitzer Hospital, Dordrecht (H.G.M.R.-L.), the Department of Obstetrics and Gynecology, Bravis Hospital, Roosendaal (C.C.M.T.), the Department of Obstetrics and Gynecology, Röpcke-Zweers Hospital, Hardenberg (M.K.), the Department of Obstetrics and Gynecology, Zaans Medical Center, Zaandam (A.B.H.), the Department of Obstetrics and Gynecology, Elkerliek Hospital, Helmond (A.P.G.), the Department of Reproductive Medicine, Maastricht University Medical Center, Maastricht (R.G.), the Department of Obstetrics and Gynecology, Canisius-Wilhelmina Hospital, Nijmegen (C.F.H.), the Department of Obstetrics and Gynecology, Wilhelmina Hospital, Assen (A.V.S.), the Department of Obstetrics and Gynecology, Jeroen Bosch Hospital, Den Bosch (J.-P.B.), the Department of Obstetrics and Gynecology, Westfriesgasthuis, Hoorn (J.A.M.B.), the Department of Obstetrics and Gynecology, Hospital Gelderse Vallei, Ede (E.S.), the Department of Obstetrics and Gynecology, Amstelland Hospital, Amstelveen (A.M.), the Department of Obstetrics and Gynecology, Scheper Hospital, Emmen (M.J.P.), the Department of Obstetrics and Gynecology, Gelre Hospital, Apeldoorn (M.A.F.T.), the Department of Obstetrics and Gynecology, Sint Franciscus Hospital, Rotterdam (M.H.A.H.), the Department of Obstetrics and Gynecology, Diaconessenhuis (G.A.U.), and the Department of Medical Statistics and Bioinformatics, Leiden University Medical Center (N.G.), Leiden, and the Department of Obstetrics and Gynecology, Tergooi Hospital, Blaricum (C.H.K.) - all in the Netherlands; and the School of Medicine, Robinson Research Institute, University of Adelaide, and the South Australian Health and Medical Research Institute, Adelaide, SA, Australia (B.W.J.M.)
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