The ratio of newborn boys to girls slightly and consistently leans toward males: around 106 boys are born for every 100 girls. If that seems odd to you, it should : the way sperm form suggests that the ratio of X-sperm to Y-sperm should be exactly 50:50–and scientists are only now beginning to understand why the skew occurs. Read more…
Read More:
We’re Only Beginning To Understand Why Humans Have a Skewed Sex Ratio
Placentas are amazing organs, and we’re learning that they do so much more than simply manage the movement of nutrients and wastes between mother and fetus. In this month’s issue of The Scientist , placenta expert Christopher Coe explains its other roles, including hormonal regulation, iron storage, and immune system training. Read more…
See more here:
Placentas are amazing organs, and we’re learning that they do so much more than simply manage the mo