Wildemeersch, 2000, Eur J Contracept Reprod Health Care, 5, 295, 10.1080/13625180008500400
Hubacher, 2002, Obstet Gynecol Surv, 57, 120, 10.1097/00006254-200202000-00024
Stewart, 2001, Br J Obstet Gynaecol, 108, 74
Monteiro, 2002, Contraception, 65, 325, 10.1016/S0010-7824(02)00283-4
Hidalgo, 2002, Contraception, 65, 129, 10.1016/S0010-7824(01)00302-X
Faundes, 1993, Ann Med, 25, 149, 10.3109/07853899309164159
Diaz, 2000, Contraception, 62, 59, 10.1016/S0010-7824(00)00140-2
Da Silva, 1999, Eur J Contracept Reprod Health Care, 4, 21, 10.3109/13625189909043476
Backman, 2000, Br J Obstet Gynaecol, 107, 335, 10.1111/j.1471-0528.2000.tb13228.x
Ronnerdag, 1999, Acta Obstet Gynecol Scand, 78, 716
Diaz, 1993, Contraception, 47, 169, 10.1016/0010-7824(93)90089-P
Suvisaari, 1996, Contraception, 54, 201, 10.1016/S0010-7824(96)00189-8
Chi, 1994, Adv Contracept, 10, 271, 10.1007/BF01984125
Ortayli, 2002, Contraception, 65, 107, 10.1016/S0010-7824(01)00281-5
Chimbira, 1980, Br J Obstet Gynaecol, 87, 603, 10.1111/j.1471-0528.1980.tb05013.x
Backman, 2002, Obstet Gynecol, 99, 608