In her book, Eve’s Rib: The New Science of Gender-Specific Medicine Marianne J. Legato M.D says, “Everywhere we look, the two sexes are startlingly and unexpectedly different not only in their internal function but in the way they experience illness.” To begin with there are 10 trillion cells in the human body and every one of them is sex specific. The poet, Robert Bly, glimpsed this scientific truth when he wrote that boys need to be in the company of older men “in order to hear the sound that male cells sing.”
Until recently scientists believed that our genomes were 99.9% identical from one person to the next. “It turns out that this assertion is correct,” says David C. Page, M.D., professor of biology at the Massachusetts Institute of Technology (MIT), “as long as the two individuals being compared are both men. It’s also correct if the two individuals being compared are both women.” New research from Dr. Page’s lab shows that the genetic difference between a man and a woman are 15 times greater than the genetic difference between two men or between two women.
One of the most significant differences is in our levels of the hormone testosterone. Testosterone is often called the “male” hormone. However, both men and women produce this hormone. Did you know?
- Men have 20 to 40 times more testosterone (T) than do women.
This is one reason why our sex drives are so different. Men don’t think about sex all the time as some people believe, but we do think about sex, generally, more than women.
- Testosterone is responsible for the sex drive in both men and women.
When our sex drive begins to diminish as we age, the problem may be low T in men and women. Many women, and men, don’t realize that testosterone is important in keeping a woman’s sexual desire up.
- Testosterone can be converted to estrogen, but not the other way around.