Fertility after childbirth: post-partum ovulation and menstruation in bottle and breast feeding mothers.
D000328:Adult; D001903:Bottle Feeding; D001942:Breast Feeding; D005260:Female; D006801:Humans; D007774:Lactation; D008137:Longitudinal Studies; D008598:Menstruation; D010060:Ovulation; D011247:Pregnancy; D012606:Scotland; D013997:Time Factors