We present a case of living, related-donor kidney transplantation during the first trimester of pregnancy. The patient received mycophenolate mofetil (MMF), tacrolimus, and prednisone throughout the entire pregnancy. This is the first reported case of use of MMF during pregnancy. The mother did well, except for mild preeclampsia and mild renal insufficiency at term. The baby girl was born prematurely at week 353/7. The only possible teratogenic effects detected included hypoplastic nails and short fifth fingers. No chromosomal abnormalities were found. The child is growing and developing normally. Although we do not recommend the use of mycophenolate mofetil during pregnancy based on this experience, it is reassuring to know that a successful outcome can be expected in mothers treated with MMF during pregnancy.