Archive for March, 2015

Is it a Boy or A Girl?

Complete a typical Punnets Square for sex determination and you would expect that the chance of having a boy v girl baby is 50/50, right? If this is so, then why, on average are more boy babies (51%)  born than girl babies(49%) in the U.S. every year? Incidentally, this phenomenon was first noted in the 17th century and is known as the tilted sex ratio.’  The explanation for this inconsistency is found during pregnancy itself. Although scientists still have a lot to learn about the very early developmental stages of the embryo, some interesting conclusions have been made. Read this article or listen to this podcast to learn more!

NPR – Why are More Baby Boys Born Than Girls?