Contraceptives for lactating women: a comparative trial of a progesterone-releasing vaginal ring and the copper T 380A IUD.
Sivin I, Díaz S, Croxatto HB, Miranda P, Shaaban M, Sayed EH, Xiao B, Wu SC, Du M, Alvarez F, Brache V, Basnayake S, McCarthy T, Lacarra M, Mishell DR Jr, Koetsawang S, Stern J, Jackanicz T.
Sivin I, et al.
Contraception. 1997 Apr;55(4):225-32. doi: 10.1016/s0010-7824(97)00008-5.
Contraception. 1997.
PMID: 9179454
Clinical Trial.