It's becoming well established that maternal stress during pregnancy can affect fetal and child development as well as birth outcomes, and a new study from researchers at Columbia University Vagelos College of Physicians and Surgeons and NewYork-Presbyterian now identifies the types of physical and psychological stress that may matter most. Because stress can manifest in a variety of ways, both as a subjective experience and in physical and lifestyle measurements, Monk and her colleagues examined 27 indicators of psychosocial, physical, and lifestyle stress collected from questionnaires, diaries, and daily physical assessments of otherwise healthy pregnant women, ages 18 to The study suggested that pregnant women experiencing physical and psychological stress are less likely to have a boy. On average, around males are born for every female births.
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