Multiple pregnancy. 2.
D000818:Animals; D002869:Chromosome Aberrations; D000013:Congenital Abnormalities / Q000235:genetics*; D004200:Diseases in Twins / Q000209:etiology / Q000235:genetics; D004314:Down Syndrome / Q000235:genetics; D004777:Environment; D005260:Female; D006330:Heart Defects, Congenital / Q000235:genetics; D006801:Humans; D007231:Infant, Newborn; D008607:Intellectual Disability / Q000235:genetics; D007621:Karyotyping; D008297:Male; D009030:Mosaicism; D010063:Ovum; D011247:Pregnancy; D011272:Pregnancy, Multiple; D011581:Psychological Tests; D014310:Triplets; D014424:Turner Syndrome / Q000235:genetics; D014427:Twins; D014428:Twins, Conjoined