1. The gender gap in autoimmune disease;McCarthy;Lancet,2000
2. Fecundity and infertility in the United States: incidence and trends;Mosher;Fertil. Steril.,1991
3. Fertility, family planning, and women's health: new data from the 1995 National Survey of Family Growth;Abma;Vital. Health Stat.,1997
4. Present concept of unexplained infertility;Isaksson;Gynecol. Endocrinol.,2004
5. Births: final data for 2000;Martin;Natl. Vital. Stat. Rep.,2002