- Women who use intrauterine devices for birth control may be less likely to develop ovarian cancer, a research review suggests.
IUDs are T-shaped devices about the size of a quarter that are inserted into the uterus to prevent pregnancy. The devices can be used for several years; they prevent conception by stopping sperm from reaching the egg. Some IUDs release low levels of hormones that help thicken the mucus on the cervix to make it harder for sperm to reach the egg.
Oral contraceptives have previously been linked to a lower risk of ovarian cancer, the study team notes.
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