Nutrition, lactation, and birth interval components in rural Guatemala

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Abstract
The effects of maternal nutritional status and food supplementation ingested by the infant on the duration of postpartum amenorrhea and on the duration of the menstruating interval was examined. A significant negative association was found between the nutritional status of the mother during the 3rd trimester of pregnancy and infant supplementation, on the one hand, and the length of postpartum amenorrhea on the other hand. These associations remained significant after controlling for each other and for other potentially confounding factors for which data were collected. These results support the hypothesis that maternal nutritional status, by determining the amount of breast milk available, hence the frequency, duration, and intensity of suckling, is indirectly, negatively associated to the length of postpartum amenorrhea. Furthermore, no association between maternal nutritional status and the length of the menstruating interval was found.