If newborn humans are as susceptible to leukemogens as new born laboratory animals, and if jxrtential human leukemogens are jieriodically active, it should be possible to demonstrate periodicities in the birth dates of leukemic children. To test the hypothesis that the birth dates of leukemic children are ran domly distributed in space and time, we studied 375 leukemic children who were born du...

We examined the relationship between season of birth and depressive and suicidal symptoms among 859 elderly outpatients. Date and country of birth were recorded for each participant. Those in utero during the Northern or Southern Hemisphere flu peak were expected to show the highest depressive and suicidal symptoms. Hypotheses were partially supported.

Accumulated five years data on 197 kids of 15 Black Bengal bucks in the nucleus breeding flock of Black Bengal goats were analyzed for the study of production traits. The traits considered were birth weight, weight at every 3month interval up to 12-month, semen characteristics and milk yield. Semen parameters were evaluated from 450 ejaculates of 15 Black Bengal bucks collected twice a week by ...

OBJECTIVE To test the efficacy in terms of birth weight and infant survival of a diet supplement programme in pregnant African women through a primary healthcare system. DESIGN 5 year controlled trial of all pregnant women in 28 villages randomised to daily supplementation with high energy groundnut biscuits (4.3 MJ/day) for about 20 weeks before delivery (intervention) or after delivery (con...

The features of the rehabilitation immune system piglets after weaning were studied in connection with different seasons farrowing. To fulfill this goal, 4 groups formed from offspring sows SM-1 breed Novosibirsk selection. 1st group included winter farrowings, and 2nd, 3rd 4th groups, respectively, young animals born spring, summer autumn. Each consisted 30 animals. Studies indicators status c...

BACKGROUND Studies of season of birth or season of conception can provide clues about etiology. We investigated whether certain months or seasons of conception are associated with increased risk of autism spectrum disorders, for which etiology is particularly obscure. METHODS The study population comprises 6,604,975 children born from 1990 to 2002 in California. Autism cases (n = 19,238) were...