Good question. I didn't know that taking testosterone had to be a permanent thing for an FTM if he wanted to keep growing facial hair.
Does the blood of a male differ that significantly from the blood of a female?
Yes, a FTM would need an injection of testosterone every two weeks to keep his male secondary sexual characteristics, I believe.
The central biological difference between adult men and women, is not that men have testosterone and women don't. It's that men produce much, much more of it than women do. An average woman has 40 to 60 nanograms of testosterone in a deciliter of blood plasma. An average man has 300 to 1,000 nanograms per deciliter.
At conception, every embryo is female and unless hormonally altered will remain so. You need testosterone to turn a fetus with a Y chromosome into a real boy, to masculinize his brain and body. However, testosterone could also masculinize a female fetus.
I just found
another article that said Thomas Beatie is having a daughter and also:
His obstetrician, Dr. Kimberly James, who practices in the Oregon town, told Winfrey, "This is a normal pregnancy."
She said Beatie stopped taking testosterone two years ago and his levels of the hormone are normal.
"This baby is totally healthy," she said. "This is what I consider a normal pregnancy."
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