title: Subdermal levonorgestrel implants and pituitary function.
abstract: This study was designed to report changes in circulating FSH, LH, and prolactin levels in women users of subdermal levonorgestrel implants.  The subjects comprised 21 women implanted with 6 silastic rods, each containing 34 mg levonorgestrel, between days M0 and M+4 of the menstrual cycle.  Blood samples were drawn prior to, 1 month and 6 months after implantation, during the early follicular phase in menstruating (n=12), and randomly in amenorrheic (n=9) subjects.  No significant differences were noted between the mean values of estimated hormones at the 3 intervals of estimation in both regularly menstruating and amenorrheic groups.
authors.forename: M I
authors.initials: MI
authors.lastname: Abdalla
authors.forename: M A
authors.initials: MA
authors.lastname: Shafeek
authors.forename: M M
authors.initials: MM
authors.lastname: Fayad
authors.forename: I I
authors.initials: II
authors.lastname: Ibrahim
mesh_terms: D000367:Age Factors; D000568:Amenorrhea; D001695:Biology; D003267:Contraception; D003270:Contraceptive Agents; D003271:Contraceptive Agents, Female; D004194:Disease; D004703:Endocrine System; D005193:Family Planning Services; D005640:Follicle Stimulating Hormone; D006062:Gonadotropins; D006065:Gonadotropins, Pituitary; D006728:Hormones; D016912:Levonorgestrel; D007986:Luteinizing Hormone; D008598:Menstruation; D008599:Menstruation Disturbances; D010298:Parity; D010827:Physiology; D010902:Pituitary Gland; D010907:Pituitary Hormones; D011388:Prolactin; D012098:Reproduction; D012102:Reproductive Control Agents
chemical_list: D003270:Contraceptive Agents; D003271:Contraceptive Agents, Female; D006062:Gonadotropins; D006065:Gonadotropins, Pituitary; D006728:Hormones; D010907:Pituitary Hormones; D012102:Reproductive Control Agents; D016912:Levonorgestrel; D011388:Prolactin; D007986:Luteinizing Hormone; D005640:Follicle Stimulating Hormone
keywords: Age Factors; Amenorrhea; Biology; Contraception; Contraceptive Agents; Contraceptive Agents, Female; Contraceptive Agents, Progestin; Contraceptive Implants; Contraceptive Methods; Diseases; Endocrine System; Family Planning; Follicle Stimulating Hormone--analysis; Gonadotropins; Gonadotropins, Pituitary; Hormones; Levonorgestrel; Luteinizing Hormone--analysis; Menstruation; Menstruation Disorders; Parity; Physiology; Pituitary Gland; Pituitary Hormones; Prolactin--analysis; Reproduction; Reproductive Control Agents