He has a difficult personality. Seema Jayachandran tried to quantify how much of the skew in sex ratio in India might be attributed to the decline of the fertility rate in the country. In: Chapman P ed. She spent her early years of high school in a single-sex school before moving to co-ed between years 10 and But the stronger immune response of females comes with a cost.
Boy or girl? It's in the father's genes -- ScienceDaily
This means fewer boys survive the first few years of life. I also like older women too. The gene, which Mr Gellatly has described in his research, could explain why this happened. In all countries, there are more male than female births the extent of which varies by country as we will see below. Men within the social order are the fixed points, and women the moving points: when a daughter marries, she leaves the current family to join a new one. The reason for this difference has been an important question for decades — the answer is still not clear.