A prospective randomized study comparing the clinical effects of a norethisterone and a levonorgestrel containing low dose oestrogen oral contraceptive pills.
Author(s): Anstee P, Kovacs GT
Affiliation(s): Family Planning Association of Victoria, Melbourne.
Publication date & source: 1993-02, Aust N Z J Obstet Gynaecol., 33(1):81-3.
Publication type: Clinical Trial; Randomized Controlled Trial
The two types of low dose oral contraceptives one containing levonorgestrel the other containing norethisterone have been compared in a randomized prospective study. We have found that cycle control was much poorer with the norethisterone pill and would therefore recommend that if the norethisterone-containing pill needs to be prescribed then either the 1 mg or the 'synphasic' preparation should be considered.
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