Pregnancies in XY women: Is a weak myometrium cause of complications during pregnancy and delivery?

Two 46, XY women with Swyers syndrome: A 39 years old with a normal twin pregnancy and a 26 year old with a singleton pregnancy and uterine rupture in the 2nd trimester. A woman with Swyer syndrome carried a twin pregnancy and delivered by caesarean section, while another Swyer syndrome patient with a singleton showed uterine rupture gestation week 20. These results and the present literature with only about 20% vaginal deliveries may suggest that the uterus of the 46, XY women might be weak and unable to contract compared to uterine muscles in normal women due to its hypoplastic nature.