The role of environmental factors in the etiology of so-called congenital malformations. I. Deductions from the presence of cleft lip and palate in one of identical twins, from embryology and from animal experiments.

ABNORMALITIES/etiology and pathogenesis CLEFT PALATE/etiology and pathogenesis HARELIP/case reports TWINS/abnormalities

Animal Experimentation Animals Cleft Lip Cleft Palate/etiology Congenital Abnormalities/etiology Female Health Services Humans Medical Records Pregnancy Pregnancy Complications Twins/abnormalities Twins, Monozygotic