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Questions of A More Technical Nature

Do Baby Boys From Type A Moms Have Bigger Heads?


STUDY:
Maternal blood group in ABO and Rh systems and somatic condition of newborns.

JOURNAL:
Rocz Akad Med Bialymst 1998;43:154-9

AUTHORS:
Litwiejko-Pietrynczak E, Ochryciuk A, Wilk-Zebik M, Bukin M, Mankowska I.

ABSTRACT:
Maternal blood group in ABO and Rh systems and somatic conditions of newborns. A group of 5454 eutrophic newborns (2649 female and 2805 male) from Bialystok were examined with respect to the following anthropometric features: body mass, crown-rump length (Si), head and chest circumferences and their, relation to the maternal ABO and Rh blood groups. The mathematical description was done with the aid of computer (Statistica 4.0 for Windows) estimating statistical characteristics specific for mass phenomenon of regular distribution (x, SD). Significance of the obtained differences was evaluated with student t test. On the basis of the carried out research, it can be concluded that maternal blood group A may favor male newborns to have higher mean values of body mass, head and chest circumferences, and female newborns--of head circumference only. The crown-rump length of newborns of both sexes does not show any alterations in relation to maternal blood group. Maternal Rh has no influence on the examined somatic development parameters of the newborns either.


COMMENTARY:
We know that maternal blood type (again type A) influences the repeat occurence of ear infections within the first few years of life. (1) Here is a study which shows greater head and chest size in boys from type A mothers (head size and for both male and female children from type A mothers).

My mother was type A. Perhaps this is why I cannot ever find a hat that fits!

1. Clin Otolaryngol 1994 Aug;19(4):327-31








The Ask Dr. D'Adamo internet advice column ran from 1996 to 2009, at which time Dr. D'Adamo's teaching and programming responsibilities no longer allowed him to devote time and resources to directly answering visitor questions. However we've recently reorganized this treasure-trove of material and made it again available to his readership. He occasionally posts new entries. These are marked with a NEW tag.



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