Immunosuppressants puts you at high risk of infection and side effects of the drugs can be severe and are considered to shorten life expectancy themselves. Women who have had this surgery have done so just to get pregnant so the transplant is removed once the baby is born, so they can stop immunosuppressants.
Meanwhile, pregnant women must not drink much coffee or tea, are encouraged to avoid any alcohol, definitely must not eat mold-ripened cheeses or soft-boiled eggs, the nitrites in cured meats are bad for the baby, tuna may give the baby mercury poisoning, ibuprofen might harm the baby's kidneys. But, hey, immunosuppressants - Some immunosuppressive drugs are teratogenic and should be replaced even before the pregnancy, while other drugs need to be managed with caution to prevent fetal risks, including miscarriage, intrauterine growth restriction, prematurity, and low birth weight. - fill yer boots! Man-feelz override any considerations for the resultant child.
Quote taken from: www.ncbi.nlm.nih.gov/pmc/articles/PMC6306731/#sec13-jcm-07-00552title - an article about how to support pregnancy in women who are obliged to take immunosuppressants.