Male to Female Birth Ratio Reduced in U.S. and Japan
Tuesday April 17, 2007
While there are typically more males born in a given population than females (the ratio is usually 105 males for every 100 females), in the United States and Japan, the number of males per 100 females has been declining. Reuters reports, based on study results, that the decrease is likely due to exposure to environmental pollutants. The data shows that, "In the U.S., the proportion of boys dropped from 105.5 per 100 girls in 1970 to 104.6 in 2001; in Japan, the male-to-female ratio dropped from 106.3 boys for every 100 girls to just fewer than 105 per 100."
Comments
Did anyone ever think that abortion may have anything to do this? How many thousands of babies a re murdered every year. Maybe just maybe we would find the missing children in the grave.
Hi Annette! Thanks for your post! However, I’m not sure how abortion would modify the sex ratio of males to females.
what are seemingly advantages are really disadvantages. the permafrost melting would probably give rise to malaria there. you could create a schools network on your site across the world I am from india and iam sure many people across the world will benefit from better awareness.
I think that if planned births have a higher result of girls over boys - ie people trying have intercourse before ovulation which would increase the chance of having a girl since Y sperms live longer…than the trend of higher educated parents and people delaying child bearing will continue to impact this ratio as well as the ratio of boys to girls in a specific setting such as higher educated parents from a higher socio economic background. Especially with first born children, the ratio of girls to boys among our friends is extremely high.