Maternal-fetal medicine specialty deals with the treatment, diagnosis and prevention of diseases and disorders that may affect expectant mothers and their developing babies. Maternal fetal medicine specialists are specifically trained to address all the unique requirements of a to-be mother and the baby she is carrying in her womb. They are of prime importance in the handling of high-risk and complicated pregnancies. MFM specialists are also called perinatologists or high risk pregnancy doctors. You may also need to consult an MFM specialist if you are planning a baby and you are a patient of heart disease, seizures, diabetes, auto immune diseases, blood clotting disorders or infections like HIV or cytomegalovirus. Besides this if you had a preterm labor in the past you should consult an MFM specialist before you your next baby.