title: ABO segregation distortion in Visakhapatnam, India.
abstract: Distortions in mother-infant, mother-child and father-child segregation for the ABO system as well as in the sex of offspring are described in a sample from a maternity service and from families of Visakhapatnam, India. Some distortions follow the expected fetomaternal incompatibility depression, others the expected feto-maternal induction of tolerance, and some remain unexplained. A differential action of selective factors on male and female fetuses, infants and children was also found, but no hypothesis could be postulated to explain it. The mother-infant matrix was found to be different from the mother-child matrix probably due to the inclusion of the reproductive time only in the mother-infant matrix. Unexpectedly, father-child segregation distortions were also found.
authors: Department of Genetics, PGIBMS, Taramani, Madras, India.
authors: J R
authors: JR
authors: Kumari
authors: C R
authors: CR
authors: Srikumari
authors: C Y
authors: CY
authors: Valenzuela
mesh_terms: D000017:ABO Blood-Group System; D000328:Adult; D005220:Fathers; D005260:Female; D006801:Humans; D007194:India; D007231:Infant, Newborn / Q000097:blood*; D008297:Male; D009035:Mothers; D011446:Prospective Studies; D012744:Sex Ratio; D012923:Social Class
chemical_list: D000017:ABO Blood-Group System