Culotta, E.: "Birth Tale Gets a New Twist," Science, vol. 268, page 365, April 21, 1995. The phenomenon of mammalian birth is reexamined in this short but interesting paper.

Fischman, J. and L. Ray: "Insights into Reproduction," Science, vol. 266, page 1459, December 2, 1994. Reproduction in humans is discussed.

Greene, W.: "AIDS and the Immune System," Scientific American, vol. 269, pages 98–105, September 1993. The feature article of this issue discusses how the virus is transmitted and how it "programs" the immune system to replicate the virus—with the subsequent consequences.

Holden, C.: "The Hazards of Estrogen," Science, vol. 260, pages 1238–39, May 28, 1993. Estrogen is essential for a properly functioning reproductive system in females, but what effect does estrogen, either naturally produced or supplied as a supplement, have on individuals, including developing fetuses?

Hunter, R.: Sex Determination, Differentiation, and Intersexuality in Placental Mammals, Cambridge University Press, Cambridge, 1995. An excellent look at placental mammalian reproduction, including discussions of embryology, sex determination and differentiation, and even hermaphroditism.

Lagercrantz, H. and A. Slotkin: "The ‘Stress’ of Being Born," Scientific American, April 1986, pages 100–107. Passage through the narrow birth canal triggers the release of hormones important to the newborn’s future survival.

Paabo, S.: "The Y Chromosome and the Origin of All of Us (Men)," Science, vol. 268, pages 1141–42, May 26, 1995. Why are there Y chromosomes? Are men really necessary? The origin of man and population genetics are explored under these blanket questions.