Gender Difference in Breast Tissue Size in Infancy: Correlation with Serum Estradiol


Breast tissue in newborn infants is considered to be physiologic and mainly related to exposure to maternal hormones in utero or through breast-feeding. However, controversy exists as to whether breast tissue in later infancy is under the influence of endogenous hormones. Children at 2–4 mo of age have a surge of reproductive hormones, including estradiol… (More)
DOI: 10.1203/00006450-200211000-00012


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