The Relationship Between Anti-Mullerian Hormone Levels and Pregnancy Outcomes in Patients with Recurrent Unexplained Miscarriage

Abstract

Background: This study aimed to assess the correlation between serum levels of anti-Mullerian hormone (AMH), basal follicle-stimulating hormone (FSH), basal luteinizing hormone (LH), and basal estradiol with pregnancy outcomes. Methods: Conducted at Shariati Hospital in Tehran from 2020 to 2021, this prospective cohort study included women under 38 years old with idiopathic recurrent miscarriage (IRM). Individuals with AMH levels below 1 ng/mL were classified as the poor responder group. All participants with IRM received a daily combination of 20 mg prednisolone and 200 mg progesterone vaginal suppositories from the beginning of pregnancy until 12 weeks, along with aspirin and folic acid. Pregnancy was monitored until 36 weeks, and outcomes were evaluated over two years using univariate and multiple logistic regression, with P-values < 0.05 considered significant. Results: The study comprised 128 individuals with a mean age of 36.4 ± 3.9 years. Of these, 80 became pregnant, while 48 did not. Among the pregnant individuals, 34 had terminations before 26 weeks (13 ongoing and 21 clinical), while 46 had pregnancies lasting 26 weeks or longer. Maternal age (RR = 1.23, 95% CI: 1.10 - 1.90, P = 0.001), history of abortion (RR = 1.262, 95% CI: 1.052 - 1.327, P = 0.008), and low serum AMH level (RR = 0.752, 95% CI: 0.227 - 0.934, P = 0.035) were significantly associated with the probability of subsequent pregnancies. Maternal age (RR = 1.108, 95% CI: 1.05 - 1.350, P = 0.025) and history of abortion (RR = 1.097, 95% CI: 1.02 - 1.161, P = 0.042) were the only factors associated with the risk of non-pregnancy. Conclusions: The study findings suggest that AMH levels in women with IRM significantly influence pregnancy outcomes, including abortion and live births at 26 weeks or more. The univariate analysis revealed significant correlations between age, serum AMH levels, previous history of abortion, and the risk of abortion. Additionally, AMH levels were found to relate to follicle storage rather than egg quality, indicating that AMH does not predict live birth after IVF. Overall, this prospective study underscores the importance of maternal age, AMH level, and previous abortion history in predicting pregnancy outcomes.