ABO Blood Groups and Sex Ratio at Birth

ABO blood groups and sex ratio at birth.

Postmenopausal Genital Tuberculosis W. H. Roberts .......................... 526 Footballer's Migraine R. N. Lucas, D.P.M ..................... 526 Recurrent Urinary Infections in a Girl R. H. Jackson, F.R.C.P., and A. Smith, F.R.C.G.P ............................... 526 Recurrent Urinary Infections P. Dure-Smith, M.D., F.F.R ............... 527 Depressive Illness and Aggression in Belfast H. A...

Sex ratio at birth and latitude.

Mother's occupation and sex ratio at birth

BACKGROUND Many women are working outside of the home, occupying a multitude of jobs with varying degrees of responsibilities and levels of psychological stress. We investigated whether different job types in women are associated with child sex at birth, with the hypothesis that women in job types, which are categorized as "high psychological stress" jobs, would be more likely to give birth to ...

Placenta praevia and sex ratio at birth.

The ratio of male to female sex among infants born to 391 women with and 114 079 without placenta praevia was analysed by parity. In the women without placenta praevia the sex ratio decreased significantly with increasing parity, whereas in the women with placenta praevia it increased. Overall, the sex ratio was increased among the women with placenta praevia, particularly multiparas. An increa...

Sex ratio at birth in Croatia: update.

There is strong evidence that the sex ratio at birth is partially determined by environmental and social factors. The modern change in those factors serves as an explanation for the secular decline in sex ratio at birth in most of the industrialized countries. This article is the reexamination of the results from my previous communication in which no trend in sex ratio at birth was established ...