CONTINUOUSLY RECORDED SUCKLING BEHAVIOUR AND ITS EFFECT ON LACTATIONAL AMENORRHOEA

H. WILLIAM TAYLOR, MARGARET VÁZQUEZ-GEFFROY, Donna M. Taylor, STEVEN J. SAMUELS
In: Journal of Biosocial Science · 1999 · vol. 31(3) , pp. 289–310 · doi:10.1017/s0021932099002898 · PMID:10453245 · W3343618
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Abstract

The hypothesis that the month-specific rate of return to ovarian cyclicity after childbirth is causally related to suckling pattern was tested for a population of New Mexican women recruited within the service area of New Mexico Highlands University and for a nationwide USA subpopulation of women recruited through membership of the Couple to Couple League (CCL). Survival analysis for time-dependent covariates was used, and significant predictors of the first postpartum menses were found. Important differences were detected in the suckling pattern for the two groups and a 5:2 differential was found in their respective rates of menstrual cycle recovery. Although the two groups were comparable perinatally, daily and time-windowed breast-feeding performance fell off at twice the rate for the New Mexico population when contrasted with the CCL sample. For both populations, the introduction of solid feeds was a strong and significant predictor of returning menstrual cyclicity, independent of suckling pattern.

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