Sorry for your daughter, you have not mentioned what was her gestational age?, lets say its in first trimester or early second trimester the blame can be with the abnormal fetus and not related with pelvic pathologis, as most of the first trimester abortions are because of ANEUPLODIES. If the ultrasound
is showing a huge cyst
, it may interfere in the fetal growth, but to comment on this I need to know the complete ultrasound.
Hope I answered your question, Kindly reply me if you have any further queries or any comments. I will be very happy to help you.