A multicentre comparative study of serum lipids and lipoproteins in four groups of oral combined contraceptive users and a control group of IUD users. World Health Organization. Task Force on Oral Contraceptives.
A prospective clinical trial was conducted in three centres to assess the effects of the type and dose of progestogen, the dose of estrogen and the progestogen-to-estrogen ratio of oral contraceptives on lipid metabolism. The preparations selected contained levonorgestrel 250 micrograms + ethinyl estradiol 50 micrograms (Neogynon), levonorgestrel 250… (More)