Chen H, Cai J, Liu L, Sun X. Roles of estradiol levels on the day of human chorionic gonadotrophin administration in the live birth of patients with frozen embryo transfer.
J Clin Lab Anal 2020;
34:e23422. [PMID:
32715506 PMCID:
PMC7521236 DOI:
10.1002/jcla.23422]
[Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2019] [Revised: 04/08/2020] [Accepted: 05/08/2020] [Indexed: 11/25/2022] Open
Abstract
Background
Estradiol (E2) is an important hormone in women. Changes of serum E2 levels may affect the endometrial receptivity for embryo implantation and thus affect pregnancy outcomes. This study was to assess the association between serum E2 levels on the day of human chorionic gonadotrophin (HCG) administration and live‐birth rates in patients with frozen embryo transfer (FET).
Methods
Totally 2071 women receiving long protocols of long‐acting gonadotropin‐releasing hormone (GnRH) agonists were enrolled. According to the E2 levels on the day of HCG administration, these patients were divided into four groups: 676 cases of E2 ≤ 3051 pg/mL in Q1 group, 676 cases of 3051 pg/mL < E2 ≤ 4558 pg/mL in Q2 group, 675 cases of 4558 pg/mL < E2 ≤ 6718 pg/mL in Q3 group, and 674 cases of E2 > 6718 pg/mL in Q4 group. The clinical indicators including female age, body mass index (BMI), duration of infertility, infertility styles, treatment protocols, hormone levels, total antral follicle count, endometrial thickness, top‐level embryos, and live‐birth rates were analyzed, and multivariable logistic model was conducted to select significant variables.
Results
Significant differences were observed for the female age (OR = 0.965, 95% CI: 0.946‐0.985, P < .001), total antral follicle counts (OR = 1.025, 95% CI: 1.008‐1.043, P = .004), transferring what day of embryos (OR = 1.242, 95% CI: 1.137‐1.356, P < .001), endometrial thickness (OR = 1.058, 95% CI: 1.004‐1.115, P = .035), top‐level embryos (OR = 1.416, 95% CI: 1.157‐1.731, P = .001), and E2 levels on HCG day >6781 pg/mL (OR = 1.344, 95% CI: 1.069‐1.690, P = .011) between live‐birth and non‐live‐birth groups. The area under the curve (AUC) for E2 levels on HCG day was 0.558, the sensitivity was 54.75%, and the specificity was 55.10%.
Conclusion
Serum E2 level on HCG day was an independent predictor of live‐birth achievement in patients with FET.
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