Number of births to maintain competence.
D002170:Canada; D002983:Clinical Competence / Q000592:standards*; D003406:Credentialing / Q000592:standards*; D036861:Delivery, Obstetric / Q000706:statistics & numerical data; D005194:Family Practice / Q000592:standards*; D005260:Female; D006801:Humans; D009774:Obstetrics / Q000592:standards*; D011247:Pregnancy