“Studies have been done on women who have received kidney and liver transplants and who have taken immunosuppressants during a pregnancy. Included in the studies are 15,000–20,000 children born to mothers with organ transplants.

These studies suggest that the child can be born about one week earlier than usual, that the child may have a slightly lower birth weight than normal and that there is an increased risk of pregnancy poisoning. This is not held to be due to the patient’s immunosuppression but rather to the fact that the patient’s illness which occasioned the transplantation in the first place may have resulted in this pregnancy problem. Nothing in the studies suggest an elevated risk of fetal malformation.”

http://sahlgrenska.gu.se/english/research/uterus