Why has it taken researchers more than 40 years to come up with a male equivalent of the birth-control pill? One reason is that pharmaceutical companies haven’t had much interest in — and more importantly, haven’t had much research funding for — a male birth-control pill. The other reason stems from inherent differences in male and female anatomy. The female birth-control pill contains synthetic forms of the hormones estrogen and progesterone, which prevent the ovaries from releasing an egg for fertilization. But unlike women, who release just one egg a month during a regular process of ovulation, men release about 120 million sperm with each ejaculation. It’s a lot harder to control millions and millions of sperm than it is to control a single egg. Health and Beauty tips
Apr 28