The embryo will become female unless it has a “Y” chromosome that leads to the formation of testes that produce testosterone. If the testes fail to produce testosterone the result will be a genetically male child with female genitals. (Nicholson, John. Men and Woman: How Different are They? p 11-12. NY:Oxford University Press, 1984.)

Female is the default plan. Even if a Y chromosome is present, if male hormones do not alter template the fetus will be born looking like a female. (Fisher, Helen.The First Sex. p xviii-xix. NY:Random House, 1999.)

For the first 6 weeks following conception, all fetuses are essentially the same and indistinguishable. Describes changes to genetic male fetus beginning about 6 weeks and to genetic female fetus at about 12 weeks. (Stump, Jane Barr, PhD.What’s the Difference? p 79. NY:William Morrow and Company, Inc., 1985.)

All fetuses start out female. (Gurian, Michael, PhD, and Patricia Henley, with Terry Trueman. Boys and Girls Learn Differently! p 41. CA:Jossey-Bass, 2001.)

The basic template for human brains and bodies is female. (Pease, Barbara and Allan. Why Men Don’t Listen and Women Can’t Read Maps. p 55-60, 171-172. NY:Broadway Books, 1998.

The natural template of the brain seems to be female. That is, the brain develops into a female pattern unless dosed with androgens during gestation. (Moir, Anne, and David Jessel. Brain Sex. p 24-26, 115. NY:Carol Publishing Group, 1989, 1991.)

The natural template of the brain seems to be female. That is, the brain develops into a female pattern unless dosed with androgens during gestation. (Moir, Anne, and David Jessel. Brain Sex. p 24-26, 115. NY: Carol Publishing Group, 1989, 1991.)

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