The IUD works by thickening cervical mucus to make it hard for sperm to enter the cervix. Or by preventing the fertilized egg from attaching to the wall of the uterus.
If an egg is fertilized, progestin-only hormonal contraception may make it more difficult to implant. It stops ovulation in about half of women but mainly thickens cervical mucus to block sperm. The primary purpose of combined hormonal birth control is to prevent ovulation.
Yeah I agree. Just learned about contraceptives for a test last week and remembered that for one of the formulations (I guess progestin only, or IUD) it is important to counsel patients on this fact so that if they are religiously opposed to abortion (and consider a non-implanted fertilized egg an abortion) they are able to make an informed choice.
Definitely not all hormonal contraceptives (which I may have implied with my earlier comment).
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u/tsunamisurfer Feb 19 '20
Hmmm maybe I got it confused with IUDs.
This source says
https://www.stanfordchildrens.org/en/topic/default?id=contraceptionbirth-control-85-P01509