The sex ratio of offspring is associated with the mothers' age at menarche. 2011

Jin Jia, and Rong Zhou

UI MeSH Term Description Entries
D007231 Infant, Newborn An infant during the first 28 days after birth. Neonate,Newborns,Infants, Newborn,Neonates,Newborn,Newborn Infant,Newborn Infants
D008297 Male Males
D008423 Maternal Age The age of the mother in PREGNANCY. Age, Maternal,Ages, Maternal,Maternal Ages
D008572 Menarche The first MENSTRUAL CYCLE marked by the initiation of MENSTRUATION.
D011247 Pregnancy The status during which female mammals carry their developing young (EMBRYOS or FETUSES) in utero before birth, beginning from FERTILIZATION to BIRTH. Gestation,Pregnancies
D005260 Female Females
D006801 Humans Members of the species Homo sapiens. Homo sapiens,Man (Taxonomy),Human,Man, Modern,Modern Man
D012744 Sex Ratio The number of males per 100 females. Ratio, Sex,Ratios, Sex,Sex Ratios

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