So a surge in a mother's testosterone at a point in development different from the surges produced by atwinbrother might account for the researchers' discovery.
It was the combination of these two players that was so lethal on defense, of Jordan with the player who, he said, was like having atwinbrother on the court.
There is, however, at least one way that a fetus without an SRY gene can be exposed to testosterone in the womb and that is if she has atwinbrother who is releasing his hormones into the fluid that bathes them both.