From the first glance at the newborn, the evidence is obvious--a tiny penis and a scrotum enclosing the testes. No doubt about it; a male child.
But his gender wasn't always so clear. For the first six weeks or so of gestation, this new baby boy appeared identical to a girl. He had embryonic gonadal cells that looked like they could quite normally develop into ovaries. He had tissue apparently capable of forming fallopian tubes, a uterus, and vagina.