[1] Univ Alabama Birmingham, Div Reprod Endocrinol & Infertil, Birmingham, AL 35249 USA
[2] Univ Calif San Francisco, Dept Obstet Gynecol & Reprod Sci, San Francisco, CA USA
[3] Stanford Univ, Dept Obstet & Gynecol, Stanford, CA 94305 USA
[4] Columbia Univ, Mailman Sch Publ Hlth, Dept Epidemiol, New York, NY USA
[5] Natl Inst Minor Hlth & Hlth Dispar, NIH, Bethesda, MD USA
[6] Maryland IVF, Columbia, MD USA
[7] Howard Univ, Coll Med, Dept Obstet & Gynecol, Washington, DC USA
[8] Uniformed Serv Univ Hlth Sci, Bethesda, MD 20814 USA
[9] Meharry Med Coll, Dept Obstet & Gynecol, Nashville, TN 37208 USA
[10] NIH Lib, Bethesda, MD USA
[11] Harvard Univ, Beth Israel Deaconess Med Ctr, Sch Med, Dept Obstet Gynecol & Reprod Biol, Boston, MA 02215 USA
[12] Boston IVF, Waltham, MA USA
[13] Eunice Kennedy Shriver Natl Inst Child Hlth & Hum, Program Reprod & Adult Endocrinol, NIH, Bethesda, MD USA