Initial clinical studies of intravaginal rings containing norethindrone and norgestrel

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	Year	Citations
Radioimmunoassay of serum progesterone in women receiving oral contraceptive steroids Ian H. Thorneycroft, Sergio C. Stone Contraception Hormonal ContraceptiveFertilitySerum ProgesteroneOral ContraceptiveReproductive Health	1972	311
MULTIPLE SCLEROSIS John Burt Foster, D. J. Newell, Henry Miller, The Lancet	1961	179
Contraceptive Effect of Varying Dosages of Progestogen in Silastic Vaginal Rings Daniel R. Mishell, Mary E. Lumkin Fertility and Sterility InfertilityContraceptive UseContraceptionFertilityHormonal Contraceptive	1970	108
Daily progestogen for contraception: a clinical study. Jorge Martínez-Manautou, J. Giner-Velasquez, V. Cortés-Gallegos, BMJ	1967	103
Inhibition of ovulation with cyclic use of progestogen-impregnated intravaginal devices Daniel R. Mishell, Mary E. Lumkin, Sergio Stone American Journal of Obstetrics and Gynecology InfertilityHormonal ContraceptiveContraceptive ImplantsFertilityReproductive Health	1972	45
RANDOMISED DOUBLE-BLIND TRIAL OF FOUR ORAL PROGESTAGEN-ONLY CONTRACEPTIVES M P Vessey, Eleanor Mears, L Andolsek, The Lancet Contraceptive UseContraceptionHormonal ContraceptiveSexual And Reproductive HealthOral Contraceptive	1972	37
Cross-reaction of contraceptive steroids in competitive binding assays of progesterone and estradiol Khalil Kharma, Sergio Stone, Ian H. Thorneycroft, American Journal of Obstetrics and Gynecology Hormonal ContraceptiveContraceptive SteroidsMedicineHormonal ReceptorGynecology	1972	12

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