There is controversy about the notion of the exact natural sex ratio at birth. In a study around 2002, the natural sex ratio at birth was estimated to be close to 1.06 males/female. There is controversy whether sex ratios outside the 103-107 range are due to sex-selection, as suggested by some scholars, or due to natural causes. The claims that unbalanced sex ratios are necessary due to sex selection have been questioned by some researchers. Some researchers argue that an unbalanced sex ratio should not be automatically held as evidence of prenatal sex-selection; Michel Garenne reports that many African nations have, over decades, witnessed birth sex ratios below 100, that is more girls are born than boys. Angola, Botswana and Namibia have reported birth sex ratios between 94 and 99, which is quite different than the presumed "normal" sex ratio, meaning that significantly more girls have been born in such societies.
There is controversy about the notion of the exact nat,ural sex ratio at birth. In a study around 2002, the natural sex ratio at birth was estimated to be close to 1.06 males/female. There is controversy whether sex ratios outside the 103-107 range are due to sex-selection, as suggest,ed by some scholars or due to natural causes. The claims that unbalanced sex ratios are necessary due to sex selection have been questioned by some researchers. Some researchers argue that an unbalanced sex ratio should not be automatically held as evidence of prenatal sex-selection; Michel Garenne reports that many African nations have, over decades, witnessed birth sex ratios below 100 that is more girls are born than boys. Angola Botswana and Namibia have reported birth sex ratios between 94 and, 99, which is quite different than the presumed "normal" sex ratio, meaning that significantly more girls have been born in such societies.