PROGESTIN RELEASING VAGINAL RINGS EFFECTS ON SPERMATIC PENETRATION - LICHTENBERG, R; GUAL, C (INST NACL NUTR,DEPT BIOL REPROD,MEXICO CITY 22,MEXICO, 1978)
REV INVEST CLIN
Keywords: PROGESTIN, RELEASING, VAGINAL, RINGS, EFFECTS, SPERMATIC, PENETRATION; CIENCIAS MEDICAS; CIENCIAS CLINICAS; PATOLOGIA CLINICA