ABSTRACT

Objective: Male live births occur in excess of female live births and their ratio (M/F) is usually expressed as male divided by total births. The value of M/F varies, declining with stress. Israel has been shown to have a relatively stable M/F. This study was carried out in order to ascertain whether there were any racial or religious differences in M/F in Israel, and to compare with totals for Europe and North America.

ABSTRACTS

Objective: In humans, male births exceed female births. This ratio is conventionally expressed as M/F and is influenced by a large number of factors, including stress. This study was carried out in order to ascertain whether the known seasonal variation in M/F in the United States of America (USA), peaking in June, is affected by the quadrennial elections (November), and whether any such influences vary by race.