With so much sperm per ejaculate, it seems that sperm quality would hardly matter in infertility. A healthy male discharges 50 million sperm in one ejaculation. During sexual intercourse, of all those millions of sperm, only a couple hundred will make it to a mature egg that is ready to be fertilized. But 40% of infertility is from the male, including males who passed the semen analysis tests. The average sperm count today is between 20 and 40 million per milliliter in the Western world, having decreased by 1-2% per year from Continue reading Twenty factors that affect male fertility
As someone who was around in the ’50s and ’60s when there was less obesity, I have to tell you that diets were not that good. TV dinners, Wonder bread, instant mashed potatoes, fish-sticks and whole milk predominated and vegetables tended towards the overcooked. Food was cooked in Crisco, full of trans fats, and cotton seed oils. Fresh vegetables came in during the late 60s, but predominated on the coasts. There was less soda and no high fructose corn syrup, and portion sizes were somewhat smaller, but the caloric difference may not be enough to explain why we have an epidemic of infant obesity today that we didn’t then. And I doubt that the babies today are doing any less exercise, although their older siblings may be indoors on computers more instead of riding bikes. Continue reading Chemicals and Obesity: What if it isn’t all your fault?