Bosdou JK, Anagnostis P, Goulis DG, Lainas GT, Tarlatzis BC, Grimbizis GF, Kolibianakis EM. Risk of gestational diabetes mellitus in women achieving singleton pregnancy spontaneously or after ART: a systematic review and meta-analysis.
Hum Reprod Update 2020;
26:514-544. [PMID:
32441298 PMCID:
PMC7317285 DOI:
10.1093/humupd/dmaa011]
[Citation(s) in RCA: 60] [Impact Index Per Article: 15.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2019] [Revised: 02/06/2020] [Indexed: 12/16/2022] Open
Abstract
BACKGROUND
Women who achieve pregnancy by ART show an increased risk of obstetric and perinatal
complications compared with those with spontaneous conception (SC).
OBJECTIVE AND RATIONALE
The purpose of this systematic review and meta-analysis was to synthesize the best
available evidence regarding the association between ART and gestational diabetes
mellitus (GDM) in women with singleton pregnancies. The research question asked was
whether the risk of GDM is higher in women achieving singleton pregnancy by ART compared
with those achieving singleton pregnancy spontaneously.
SEARCH METHODS
A literature search, in MEDLINE, Scopus and Cochrane databases, covering the period
1978–2019, was performed aiming to identify studies comparing the risk of GDM in
singleton pregnancies after ART versus after SC. Both matched and unmatched studies were
considered eligible. Meta-analysis of weighted data was performed using the random
effects model. Results were reported as risk ratio (RR) with 95% CI. Heterogeneity was
quantified with the I2 index.
OUTCOMES
The study reports on 63 760 women who achieved a singleton pregnancy after ART (GDM was
present in 4776) and 1 870 734 women who achieved a singleton pregnancy spontaneously
(GDM in 158 526). Women with singleton pregnancy achieved by ART showed a higher risk of
GDM compared with those with singleton pregnancy achieved spontaneously (RR 1.53, 95% CI
1.39–1.69; I2 78.6%, n = 37, 1 893 599
women). The direction or the magnitude of the effect observed did not change in subgroup
analysis based on whether the study was matched (n = 17) or unmatched
(n = 20) (matched: RR 1.42, 95% CI 1.17–1.72;
I2 61.5%—unmatched: RR 1.58, 95% CI 1.40–1.78;
I2 84.1%) or whether it was prospective
(n = 12) or retrospective (n = 25) (prospective
studies: RR 1.52, 95% CI 1.27–1.83, I2 62.2%—retrospective
studies: RR 1.53, 95% CI 1.36–1.72, I2 82.5%). Regarding the
method of fertilization, a higher risk of GDM after ART versus SC was observed after IVF
(n = 7), but not after ICSI (n = 6), (IVF: RR 1.95,
95% CI 1.56–2.44, I2 43.1%—ICSI: RR 1.42, 95% CI 0.94–2.15,
I2 73.5%). Moreover, regarding the type of embryo transfer
(ET), a higher risk of GDM after ART versus SC was observed after fresh
(n = 14) but not after frozen (n = 3) ET (fresh ET:
RR 1.38, 95% CI 1.03–1.85, I2 75.4%—frozen ET: RR 0.46, 95%
CI 0.10–2.19; I2 73.1%). A higher risk of GDM was observed
after ART regardless of whether the eligible studies included patients with polycystic
ovary syndrome (RR 1.49, 95% CI 1.33–1.66, I2 75.0%) or not
(RR 4.12, 95% CI 2.63–6.45, I2 0%), or whether this
information was unclear (RR 1.46, 95% CI 1.22–1.75, I2
77.7%).
WIDER IMPLICATIONS
The present systematic review and meta-analysis, by analysing 1 893 599 women, showed a
higher risk of GDM in women achieving singleton pregnancy by ART compared with those
achieving singleton pregnancy spontaneously. This finding highlights the importance of
early detection of GDM in women treated by ART that could lead to timely and effective
interventions, prior to ART as well as during early pregnancy.
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