Do müllerian Anomalies Affect Embryo Implantation?

The main reproductive problems associated with these malformations include, abortion , recurrent abortion ectopic pregnancy and preterm delivery . The experience gained from oocyte donation shows that these women are pregnant less, even with the transfer of good quality embryos. The hypothesis of this poor uterine receptivity is in the poor endometrial vascularization that can decrease embryo implantation. The reason for infertility in women with AM includes decreased muscle mass, decreased endometrial vascularization, decreased capacity of the endometrial cavity, less receptive areas (septum). The lower fertility observed in some women with Müllerian malformations has been partially explained by its tubal factor and its association with endometriosis, with a higher prevalence in them, compared to patients without malformations.

Studies have confirmed an irregular differentiation and estrogenic maturation of the endometrium lining the uterine septum or its internal structure, which has less presence of connective tissue and more muscle mass. Given the confusion generated if the unfavorable reproductive result is due to oocyte quality or endometrial receptivity, it is necessary to use a model that guarantees oocyte / embryo quality and this is offered by oocyte donation. The aim is to evaluate the implantation rate in women with MA who receive donated oocytes compared to women without MA.