Уи адагьы, ари асарч иалоу агормонқәа аендометриа иазеицәоуп, уи аҭыӡқәа арҵаӷоит*.
Beyond that mechanism, it is held that the hormone in these IUDs thins the lining of the uterus.* It also thickens the mucus at the cervix, thus creating a barrier to sperm moving from the vagina into the uterus.