Marie Boivin
French midwife who invented the pelvimeter and vaginal speculum, which are used to dilate the vagina and examine the cervix. She discovered causes of miscarriages and was the first to use a stethoscope to listen to the fetal heartbeat. Her books Mémorial de l’art des accouchements (The Art of Obstretrics, 1812) and Traité pratique des maladies de l’utérus et de ses annexes (1833, on diseases of the uterus) were important texts for medical students and midwives.