Anstee P, Kovacs G T
Family Planning Association of Victoria, Melbourne.
Aust N Z J Obstet Gynaecol. 1993 Feb;33(1):81-3. doi: 10.1111/j.1479-828x.1993.tb02062.x.
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.
在一项随机前瞻性研究中，对两种低剂量口服避孕药进行了比较，一种含左炔诺孕酮，另一种含炔诺酮。我们发现，炔诺酮片的周期控制效果差得多，因此建议，如果需要开含炔诺酮的药片，那么应考虑使用1毫克或“三相”制剂。
