title: Post-partum anovulation in nursing mothers.
abstract: An analysis of breastfeeding and ovulation data from 72 nursing mothers is presented. A proportional hazards model of the data strengthens the hypothesis that a pattern of short, frequent bouts of nursing defines a risk-set of women less susceptible to post-partum ovulation than those who choose to nurse on a schedule of relatively lengthy and infrequent bouts. In contrast, no effect of maternal weight-for-height on the month-specific rate of post-partum ovulation could be detected in the study population comprised of American mothers trained in self-observation of fertility signs.
authors.affiliation: School of Science and Technology, New Mexico Highlands University, Las Vegas 87701.
authors.forename: H W
authors.initials: HW
authors.lastname: Taylor
authors.forename: R E
authors.initials: RE
authors.lastname: Smith
authors.forename: S J
authors.initials: SJ
authors.lastname: Samuels
mesh_terms: D000858:Anovulation / Q000453:epidemiology* / Q000209:etiology; D001827:Body Height; D001835:Body Weight; D001942:Breast Feeding; D005260:Female; D006801:Humans; D015993:Life Tables; D049590:Postpartum Period; D016016:Proportional Hazards Models; D012307:Risk Factors; D013997:Time Factors