мирена = нет
The risk of blood clots from combined oral contraceptives has long been thought to be associated with the estrogen component of the pills, although there has been some controversy that newer generation progestins (see drospirenone) may also increase the risk
This study found no increased risk of blood clots with progestin-only pills and progestin IUDs. The observational design of the studies included in the meta-analysis limits the ability to draw firm conclusions regarding progesterone and VTE risk.
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