The contraceptive pill triples the risk of dangerous blood clots—but the dangers disappear in just four weeks after women stop taking it, new research has discovered.
The pill causes blood clots in 10 out of every 10,000 women taking it, but it had never been calculated just how long the risk remained after women stop birth control.
It’s important to know, especially if the woman is about to have major surgery or is immobile for a long time, say researchers from the University Hospitals of Geneva.
They looked at the long-lasting risk of all the combined hormonal contraceptives, which include the pill, vaginal rings and transcutaneous patches, by analysing blood samples from 66 women who had stopped any contraception.
Blood markers for clotting dropped dramatically within the first two weeks and had fallen by 85 percent after a month.