A genetic male embryo will begin to develop testes. (Nicholson, John. Men and Woman: How Different Are They? p 10-11. NY:Oxford University Press, 1984.)

The fetus has the potential to develop either male or female external genitalia. (Pease, Barbara and Allan. Why Men Don’t Listen and Women Can’t Read Maps. p 55-60. NY:Broadway Books, 1998.)

The fetus has the ability to develop in either direction: male or female genitalia. (Blum, Deborah. Sex on the Brain. p 28-30. NY:Penguin Books, 1997.)

If the embryo is genetically programmed to be male, the Y chromosome transforms a certain cluster of cells (primordial gonad) into testes that begin to produce male hormones, especially testosterone. (Stump, Jane Barr, PhD. What’s the Difference? p 79. NY:William Morrow and Company, Inc., 1985.)

The fetal auditory system is nearly complete. Every cell is influenced by the energy reflected in sound waves. (Pearsall, Paul, PhD. The Heart’s Code. p 110. NY:Broadway Books, 1998.)