[The effect of breastfeeding on fertility].
D002669:Child Welfare / Q000266:history*; D003710:Demography; D004032:Diet / Q000266:history*; D049711:History, Modern 1601-; D006761:Hospitals / Q000266:history*; D009664:Norway; D009747:Nutritional Physiological Phenomena; D013223:Statistics as Topic / Q000266:history*
Hvordan amming virker inn på fruktbarheten.