![The natural family planning-lactational amenorrhea method interface: Observations from a prospective study of breastfeeding users of natural family planning]()
The natural family planning-lactational amenorrhea method interface: Observations from a prospective study of breastfeeding users of natural family planningKennedy, Kathy I.; Parenteau-Carreau, Suzanne; Flynn, Anna; Gross, Barbara; Brown, James B.; Visness, Cynthia · American Journal of Obstetrics and Gynecology · 1991