Neuroendocrine mechanism of anovulation in users of contraceptive subdermal implant of nomegestrol acetate (Uniplant)

Coutinho, 1993, One year contraception with a single implant containing Nomegestrol acetate (Uniplant), Contraception, 47, 94, 10.1016/0010-7824(93)90112-K Brache, 1990, Ovarian endocrine function through five years of continuous treatment with Norplant subdermal contraceptive implants, Contraception, 41, 169, 10.1016/0010-7824(90)90145-L Brache, 1985, Anovulation, inadequate luteal phase and poor sperm penetration in cervical mucus during prolonged use of Norplant implants, Contraception, 31, 261, 10.1016/0010-7824(85)90096-4 Croxatto, 1987, Treatment with Norplant subdermal implants inhibits sperm penetration through cervical mucus in vitro, Contraception, 36, 193, 10.1016/0010-7824(87)90014-X Shaaban, 1993, Sonographic assessment of ovarian and endometrial changes during long-term Norplant use and their correlation with hormonal levels, Fertil Steril, 59, 998, 10.1016/S0015-0282(16)55917-2 Ladipo, 1994, Contraceptive implants, Curr Opin Obstet Gynecol, 6, 564, 10.1097/00001703-199412000-00018 Devoto, 1995, Ovarian function in subjects using Uniplant, Contracept Fertil Sex (Paris), 23, 32 Filicori, 1986, Characterization of the physiological pattern of episodic gonadotropin secretion throughout the human menstrual cycle, J Clin Endocrinol Metab, 62, 1136, 10.1210/jcem-62-6-1136 Veldhuis, 1984, Biologically active luteinizing hormone is secreted in episodic pulsations that vary in relation to the stage of the menstrual cycle, J Clin Endocrinol Metab, 58, 1050, 10.1210/jcem-58-6-1050 Bennet, 1991, Correlations between mean LH levels and LH pulse characteristics: differences between normal and anovulatory women, Clin Endocrinol (Oxf), 35, 431, 10.1111/j.1365-2265.1991.tb03561.x Schweiger, 1990, Gonadotropin secretion in the second half of the menstrual cycle: a comparison of women with normal cycles, luteal phase defects and disrupted follicular deve, Clin Endocrinol (Oxf), 32, 25, 10.1111/j.1365-2265.1990.tb03746.x Vandenberg, 1974, Effects of exogenous estrogen and progestin on pituitary responsiveness to synthetic luteinizing hormone-releasing factor, J Clin Invest, 53, 1750, 10.1172/JCI107727 Soules, 1984, Progesterone modulation of pulsatile luteinizing hormone secretion in normal women, J Clin Endocrinol Metab, 58, 378, 10.1210/jcem-58-2-378 Poindexter, 1993, The effects of a long-acting progestin on the hypothalamic-pituitary-ovarian axis in women with normal menstrual cycles, Contraception, 48, 37, 10.1016/0010-7824(93)90064-E Alvarez-Sanchez, 1986, Abnormal endocrine profile among women with confirmed presumed ovulation during long-term Norplant use, Contraception, 33, 111, 10.1016/0010-7824(86)90077-6 Cook, 1991, Secretory patterns of LH and FSH during development and hypothalamic and hypophysial characteristics following development of steroid-induced ovarian follicular cysts in dairy cattle, J Reprod Fert, 91, 19, 10.1530/jrf.0.0910019 Coutinho, 1996, Multicenter clinical trail on the efficacy, acceptability of a single contraceptive implant, of nomegestrol acetate Uniplant, Contraception, 53, 121, 10.1016/0010-7824(95)00263-4 Sir-Petterman, 1995, A simple device for serial blood collection in human subjects and animals, Exp Clin Endocrinol Diabetes, 103, 398, 10.1055/s-0029-1211385 Sir-Petterman, 1989, Effect of clomiphene citrate on pulsatile luteinizing hormone profile in normal women and polycystic ovary syndrome, Horm Metab Res, 21, 3703 Devoto, 1989, Regulation of steroid hormone synthesis by human corpora lutea: failure of follicle stimulating hormone to support luteal steroidogenesis in vivo and in vitro, Fertil Steril, 50, 628, 10.1016/S0015-0282(16)60611-8 Veldhuis, 1985, Minimizing false-positive errors in hormonal pulse detection, Am J Physiol, 248, E475 Couzinet, 1992, Progesterone stimulates luteinizing hormone secretion by acting directly on the pituitary, J Clin Endocrinol Metab, 74, 374 Brazin, 1987, Effect of nomegestrol acetate, a new 19-nor-progesterone derivative, on pituitary-ovarian function in women, Br J Obstet Gynaecol, 94, 1199, 10.1111/j.1471-0528.1987.tb02322.x