New information on the effect of genes on the variation in birth weight.
D001724:Birth Weight; D005260:Female; D005796:Genes; D014644:Genetic Variation; D005838:Genotype; D006801:Humans; D007231:Infant, Newborn; D010298:Parity; D011247:Pregnancy; D012042:Registries; D012907:Smoking; D011795:Surveys and Questionnaires; D014427:Twins