Beksinska, ME; Smit, JA; Kleinschmidt, I; Rees, HV; Farley, TM; Guidozzi, F; (2003) Detection of raised FSH levels among older women using depomedroxyprogesterone acetate and norethisterone enanthate. Contraception, 68 (5). pp. 339-43. ISSN 0010-7824 DOI: https://doi.org/10.1016/j.contraception.2003.08.003 Full text not available from this repository.