Abnormal endocrine profile among women with confirmed or presumed ovulation during long-term NORPLANT® use

Anovulation, inadequate luteal phase and poor sperm penetration in cervical mucus during prolonged use of NORPLANTR implants

Vivian Brache, Aníbal Faúndes, Elof D.B. Johansson et al. · Contraception · 1985 · 119 citations

Medicine, Gynecology, Obstetrics +17

A five-year clinical trial of levonorgestrel silastic implants (Norplant™)

Margarita Pavez, Patricia Y. Miranda, Dale N. Robertson et al. · Contraception · 1982 · 113 citations

Medicine, Surgery, Implant Surgery +2

A Four-Year Clinical Study of NORPLANT Implants

Irving Sivin, Pentti Holma, Francisco Alvarez‐Sánchez et al. · Studies in Family Planning · 1983 · 82 citations

Medicine, Surgery, Contraception +11

Release rates of levonorgestrel from silasticR capsules, homogeneous rods and covered rods in humans

Dale N. Robertson, Irving Sivin, Harold A. Nash et al. · Contraception · 1983 · 80 citations

Pharmacy, Pharmaceutics, Pharmacology +16

Plasma progesterone levels during long-term treatment with levonorgestrel silastic implants

Horacio B. Croxatto, Margarita Pavez, Patrícia Miranda et al. · European Journal of Endocrinology · 1982 · 64 citations

Medicine, Endocrinology, Gynecology +14