IS AMH A PREDICTOR OF PREGNANCY OUTCOME IN INFERTILE FEMALES?
A number of ovarian reserve markers have been proposed to predict ovarian response to gonadotropin, as well as pregnancy outcome during assisted reproduction treatment (ART) (1). Anti Mullerian hormone (AMH) is one such marker which is regarded as precise biomarker of ovarian ageing and reserves(2,3). AMH is a member of
the transforming growth factor -beta super family, a glycoprotein mainly secreted by the granulosa cells of early developing follicles of ovary. It is involved in folliculogenesis and reflects number of primordial follicles. There is an evidence regarding the positive correlation of AMH with egg reserve and oocyte yield following ovarian stimulation, both in cases of poor response and hyper-response (4,5). Despite being a good marker of ovarian response, AMH fails to predict the outcome of pregnancy (6). Therefore, the goal of the present study was to identify a possible association between serum levels of AMH and pregnancy outcome.
Materials and methods
From April 2016 to June 2016, a total of 200 women with age till 40 years were enrolled into this study and were stratified by serum AMH concentrations in two groups – group 1 (< 1 ng/ml) and group 2 (≥ 1 ng/ml). AMH levels were measured by enzyme-linked immunosorbent assay kit (ELISA). The association between serum
AMH concentrations and pregnancy outcome was analyzed by Fisher’s exact test.
Atotal of 200 patients were analyzed in our study. The outcomes of our study are shown in Table (1).
It was found that in group 1 with AMH levels <1ng/ml, there was no pregnancy. The pregnancy rate was 46.8% in the group 2 with AMH level ≥ 1 ng/ml. It shows the positive correlation of AMH levels and pregnancy outcome with significant p value of 0.0003.
Our study suggests that there is a significant association between serum AMH levels and pregnancy outcomes.
Wang et al. found a significant positive correlation between serum AMH levels and the rate of clinical pregnancy in women aged between 34 and 41 years. In women aged ≥36 years, a gradual age-related increase was observed in the degree of correlation between the clinical pregnancy rate and serum AMH levels (7). High AMH has been established as a quantitative marker of ovarian reserve and is widely used as a predictive marker of quantitative ovarian reserve. A significant positive relationship exists between pregnancy rate and the quantitative ovarian reserve as measured by the serum AMH; however, the strength of the association is modulated by patient age. The serum level of AMH is a useful predictor of ovarian response to controlled ovarian stimulation (COS), oocyte quality, fertilization, and implantation However, AMH levels may also compromise clinical outcomes. Elgindy et al. reported that an AMH cut-off value of 2.7 ng/mL showed a specificity of 82.4% in predicting clinical pregnancy, and therefore suggested that it could be useful as a clinical predictor; but their study had the limitation of only including 33 patients (8). Regarding the clinical pregnancy rate, Gnoth et al (n=132) reported no significant difference between patients with high levels of AMH and patients with low levels of AMH based on a cut-off value of 1.26 ng/mL (9). According to a recent meta-analysis published in 2015 (including 19 studies, n=5,373), serum AMH levels were poor for the prediction of clinical pregnancy (4).
Our study shows that AMH levels are good predictor of pregnancy rate. One limitation of our study was the fact that the sample size of the study was relatively limited (n=200).
AMH is an effective measure of quantitative ovarian reserve and it can predict ovarian response to controlled stimulation and it is positively correlated to the pregnancy outcomes.
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