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Power, J; French, R; Cowan, F; (2007) Subdermal implantable contraceptives versus other forms of reversible contraceptives or other implants as effective methods of preventing pregnancy. The Cochrane database of systematic reviews (3). CD001326. ISSN 1469-493X DOI: https://doi.org/10.1002/14651858.CD001326.pub2

Beksinska, ME; Smit, JA; Kleinschmidt, I; Farley, TM; Mbatha, F; (2005) Bone mineral density in women aged 40-49 years using depot-medroxyprogesterone acetate, norethisterone enanthate or combined oral contraceptives for contraception. Contraception, 71 (3). pp. 170-5. ISSN 0010-7824 DOI: https://doi.org/10.1016/j.contraception.2004.09.003 Full text not available from this repository.

French, R; Van Vliet, H; Cowan, F; Mansour, D; Morris, S; Hughes, D; Robinson, A; Proctor, T; Summerbell, C; Logan, S; +2 more... Helmerhorst, F; Guillebaud, J; (2004) Hormonally impregnated intrauterine systems (IUSs) versus other forms of reversible contraceptives as effective methods of preventing pregnancy. The Cochrane database of systematic reviews (3). CD001776. ISSN 1469-493X DOI: https://doi.org/10.1002/14651858.CD001776.pub2

Wang, D; (2002) Contraceptive failure in China. Contraception, 66 (3). pp. 173-8. ISSN 0010-7824 DOI: https://doi.org/10.1016/S0010-7824(02)00334-7 Full text not available from this repository.

Ali, MM; Babiker, AG; Cleland, JG; (2001) Analysis of failure time hierarchical data in the presence of competing risks with application to oral contraceptive pill use in Egypt. Statistics in medicine, 20 (23). pp. 3611-24. ISSN 0277-6715 https://researchonline.lshtm.ac.uk/id/eprint/16601 Full text not available from this repository.

Hanson, K; Kumaranayake, L; Thomas, I; (2001) Ends versus means: the role of markets in expanding access to contraceptives. Health policy and planning, 16 (2). pp. 125-36. ISSN 0268-1080 https://researchonline.lshtm.ac.uk/id/eprint/17166 Full text not available from this repository.

Jewkes, R; Vundule, C; Maforah, F; Jordaan, E; (2001) Relationship dynamics and teenage pregnancy in South Africa. Social science & medicine (1982), 52 (5). pp. 733-44. ISSN 0277-9536 DOI: https://doi.org/10.1016/S0277-9536(00)00177-5 Full text not available from this repository.