Inverted offspring sex ratio in specific occupations

Decline of the radio of boys to girls born in several industrialized countries corresponds with many environmental and occupational factors such as paternal exposure to pesticide, electromagnetic fields ... etc. Our aim was to study the offspring sex ratio variation in different occupations among Egyptian workers. The study revealed reduction in the sex ratio among occupational groups exposed to electromagnetic fields, anaesthetics, lead and in non-military pilots, compared to the normal sex ratio 0.515 reported world wide. The ratio was 0.63 and 0.52 in those exposed to combined mixture of pesticides and the welders respectively