Pregnancy: Category C. Minoxidil reduced conception rate and increased fetal absorption in small animals when administered at 5 times the human dose. There are no adequate and controlled studies to date using minoxidil in pregnant women, and the drug should be used during pregnancy only when the potential benefits justify the possible risks to the fetus.
Labor and delivery: The effects of the drug on labor and delivery are not known.
Lactation: Minoxidil is distributed into milk; the drug should not be administered in nursing women.