Postpartum amenorrhea duration by sex of the newborn in two natural fertility populations.

Amber Gigi Hoi Katherine DaiyRachel MacKay AltmanScott VennersClaudia ValeggiaPablo A Nepomnaschy

Published in: American journal of physical anthropology (2020)

Maya mothers with sons exhibited longer PA duration than those with daughters. This phenomenon was not observed in the well-nourished Qom, possibly due to "buffering" effects from larger energy budgets. Offspring sex may influence birth spacing and maternal life history strategies in energetically constrained environments.

Keyphrases

pregnancy outcomes
high fat diet
birth weight
gestational age
type diabetes
body mass index
metabolic syndrome
skeletal muscle
preterm birth