Mirror-image twins.
D002675:Child, Preschool; D004200:Diseases in Twins; D005260:Female; D005671:Fused Teeth / Q000235:genetics*; D006801:Humans; D008297:Male; D011247:Pregnancy; D014071:Tooth Abnormalities / Q000235:genetics*; D014427:Twins; D014430:Twins, Monozygotic