The sex ratio of human births related to maternal age.
D000367:Age Factors; D003710:Demography; D019049:Developed Countries; D004622:Embryo, Mammalian; D004625:Embryo, Nonmammalian; D005060:Europe; D005321:Extraembryonic Membranes; D005313:Fetal Death; D005333:Fetus; D008423:Maternal Age; D009026:Mortality; D010290:Parents; D011153:Population; D011154:Population Characteristics; D011157:Population Dynamics; D011247:Pregnancy; D012098:Reproduction; D017678:Sex Distribution; D012737:Sex Factors; D012744:Sex Ratio; D006113:United Kingdom
Age Factors; Demographic Factors; Developed Countries; Embryo; Europe; Fetal Death; Fetal Membranes; Fetus; Maternal Age; Mortality; Northern Europe; Parental Age; Population; Population Characteristics; Population Dynamics; Pregnancy; Reproduction; Sex Distribution; Sex Factors; Sex Ratio; United Kingdom; Western Europe