The natural cycle protocol of endometrial preparation for frozen embryo transfer decreases the miscarriage rate in women with recurrent pregnancy loss.
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引用次数: 0
Abstract
Objective: To investigate whether different endometrial preparation methods lead to different results.
Design: Retrospective cohort study.
Patients: Women with recurrent pregnancy loss undergoing frozen embryo transfer (FET).
Interventions: Natural cycle (NC) protocol (n = 111) with no drug or human chorionic gonadotropin (HCG) used for endometrial preparation, vs. the hormone replacement therapy (HRT) protocol (n = 797) with estrogen or gonadotropin releasing hormone agonist (GnRH-a) plus estrogen used for endometrial preparation.
Main outcome measures: Miscarriage rate and live birth rate (LBR).
Results: Compared to women in the HRT protocol, women undergoing NCs had fewer previous FET cycles, lower antral follicle counts (AFCs), fewer oocytes retrieved and a thicker endometrium on the day of progesterone administration. Women in the HRT group had a higher miscarriage rate (29.4% vs. 17.2%) and a lower LBR (37% vs. 46.9%) than the rates of women in the NC group. Univariate analysis showed that female age also had a negative association with the miscarriage rate. Logistic regression indicated that endometrial preparation using the NC protocol was linked to a decreased likelihood of miscarriage.
Conclusions: The NC protocol decreased the miscarriage rate and increased the LBR for patients with recurrent pregnancy loss compared with the HRT protocol.
期刊介绍:
Gynecological Endocrinology , the official journal of the International Society of Gynecological Endocrinology, covers all the experimental, clinical and therapeutic aspects of this ever more important discipline. It includes, amongst others, papers relating to the control and function of the different endocrine glands in females, the effects of reproductive events on the endocrine system, and the consequences of endocrine disorders on reproduction