by Huang, Diana Y, Usher, Robert H, Kramer, Michael S, Yang, Hong, Morin, Lucie, Fretts, Ruth C
Published in Obstetrics and gynecology (New York. 1953) (01.02.2000)

by Fretts, Ruth C, Schmittdiel, Julie, McLean, Frances H, Usher, Robert H, Goldman, Marlene B
Published in The New England journal of medicine (12.10.1995)

by Fretts, Ruth C., Usher, Robert H.
Published in Obstetrics and gynecology (New York. 1953) (1997)

by Fretts, R C, Boyd, M E, Usher, R H, Usher, H A
Published in Obstetrics and gynecology (New York. 1953) (01.01.1992)

by Fretts, R C
Published in BMJ (Online) (17.02.2001)

by Sachs, Benjamin P., Fretts, Ruth C., Gardner, Roxane, Hellerstein, Susan, Wampler, Nina S., Wise, Paul H.
Published in Obstetrics and gynecology (New York. 1953) (01.06.1995)

by Perls, Thomas T, Alpert, Laura, Fretts, Ruth C
Published in Nature (London) (11.09.1997)

by Fretts, R C
Published in Irish medical journal (01.01.1996)

by Perls, Thomas T., Fretts, Ruth C.
Published in Annals of human biology (01.05.2001)

by Fretts, Ruth C.
Published in American journal of obstetrics and gynecology (01.12.2005)

by Fretts, Ruth C, Rodman, Gladys, Gomez-Carrion, Yvonne, Goldberg, Roger, Sachs, Benjamin P, Myers, Evan, Kessel, Bruce
Published in Women's health issues (01.11.2000)

by Fretts, R C
Published in BMJ. British medical journal (International ed.) (17.02.2001)

by Heffner, Linda J, Elkin, Elena, Fretts, Ruth C
Published in Obstetrics and gynecology (New York. 1953) (01.08.2003)

by Frøen, J Frederik, Pinar, Halit, Flenady, Vicki, Bahrin, Safiah, Charles, Adrian, Chauke, Lawrence, Day, Katie, Duke, Charles W, Facchinetti, Fabio, Fretts, Ruth C, Gardener, Glenn, Gilshenan, Kristen, Gordijn, Sanne J, Gordon, Adrienne, Guyon, Grace, Harrison, Catherine, Koshy, Rachel, Pattinson, Robert C, Petersson, Karin, Russell, Laurie, Saastad, Eli, Smith, Gordon C S, Torabi, Rozbeh
Published in BMC pregnancy and childbirth (10.06.2009)

by FRETTS, Ruth C, ELKIN, Elena B, MYERS, Evan R, HEFFNER, Linda J
Published in Obstetrics and gynecology (New York. 1953) (01.07.2004)