Anyone facing infertility issues knows that when it comes to sperm, there’s a big difference between Olympic swimmers and those that will never leave the kiddie pool. But what makes those swimmers go the extra mile?
Researchers have found that it’s all about hydrodynamics. Just as professional swimmers wear swim caps and take extra steps to cruise through the water more efficiently (body waxing, anyone?), sperm with sleeker ‘swim caps’ are faster swimmers.
And it’s all in the genes. In looking at promiscuous mice, researchers found that the ratio between two specific genes is important to hydrodynamics. This is important because if these findings are similar in humans, couples facing infertility issues might have an advantage in knowing which of those swimmers (based on gene expression) are most likely to win the gold medal, so to speak. Who knows- it might be possible to alter gene expression to speed up swimmers that would otherwise need a life jacket! Read more here: