Slama, R., F. Eustache, B. Ducot, T. K. Jensen, N. Jørgensen, A. Horte, S. Irvine, J. Suominen, A. G. Andersen, J. Auger, M. Vierula, J. Toppari, J. N. Andersen, N. Keiding, N. E. Skakkebaek, A. Spira, and P. Jouannet. 2002. Time to Pregnancy and Semen Parameters: A Cross-Sectional Study Among Fertile Couples from Four European Cities.
Small, M. 1992. The Evolution of Female Sexuality and Mate Selection in Humans.
______. 1996. “Revealed” Ovulation in Humans?
Sokol, R. Z., P. Kraft, I. M. Fowler, R. Mamet, E. Kim, and K. T. Berhane. 2006. Exposure to Environmental Ozone Alters Semen Quality.
Spira, A. 1984. Seasonal Variations of Sperm Characteristics.
Stallmann, R. R., and A. H. Harcourt. 2006. Size Matters: The (Negative) Allometry of Copulatory Duration in Mammals.
Stanislaw, H., and F. J. Rice. 1988. Correlation Between Sexual Desire and Men-strual Cycle Characteristics.
Steklis, H. D., and C. H. Whiteman. 1989. Loss of Estrus in Human Evolution: Too Many Answers, Too Few Questions.
Stephens, W. N. 1961. A Cross-Cultural Study of Menstrual Taboos.
Steptoe, P. C., and R. G. Edwards. 1978. Birth After the Reimplantation of a Human Embryo.
Storgaard, L., J. Bonde, E. Ernst, M. Spano, C. Y. Andersen, M. Frydenberg, and J. Olsen. 2003. Does Smoking During Pregnancy Afect Sons’ Sperm Counts?
Strassmann, B. I. 1996a. Energy Economy in the Evolution of Menstruation.
______. 1996b. The Evolution of Endometrial Cycles and Menstruation.
______. 1997. The Biology of Menstruation in
Suarez, S. S., and A. A. Pacey. 2006. Sperm Transport in the Female Reproductive Tract.
Sugarman, M., and K. A. Kendall-Tackett. 1995. Weaning Ages in a Sample of American Women Who Practice Extended Breastfeeding.
Suomi, S. J., and C. Ripp. 1983. A History of Motherless Mothering at the Uni-versity of Wisconsin Primate Laboratory. In
Swan, S. H., E. P. Elkin, and L. Fenster. 2000. The Question of Declining Sperm Density Revisited: An Analysis of 101 Studies Published 1934–1996.
Sydenham, A. 1946. Amenorrhoea at Stanley Camp, Hong Kong, During Internment.
Thiery, M. 2000. Intrauterine Contraception: From Silver Ring to Intrauterine Contraceptive Implant.
Tiemessen, C. H. J., J. L. Evers, and R. S. G. M. Bots. 1995. Tight Fitting Underwear and Sperm Quality.
Tietze, C. 1965. History of Contraceptive Methods.
______. 1882b. La Mensuration de la Capacité du Crâne.
Treloar, A. E., R. E. Boynton, B. G. Behn, and B. W. Brown. 1967. Variation of the Human Menstrual Cycle Through Reproductive Life.
Trevathan, W. R. 2007. Evolutionary Medicine.
Trussell, J. 2011. Contraceptive Failure in the United States.
Trussell, J., R. A. Hatcher, W. Cates, F. H. Stewart, and K. Kost. 1990. Contraceptive Failure in the United States: An Update.
Tummon, I. S., and D. Mortimer. 1992. Decreasing Quality of Semen.
Tycko, B., and A. Efstratiadis. 2002. Genomic Imprinting: Piece of Cake.
Tyler, E. T. 1953. Physiological and Clinical Aspects of Conception.
Udry, J. R., and N. M. Morris. 1967. Seasonality of Coitus and Seasonality of Birth.
______. 1968. Distribution of Coitus in the Menstrual Cycle.
______. 1977. The Distribution of Events in the Human Menstrual Cycle.