What's the difference between birth control pills and HRT?
HRT does not prevent ovulation or pregnancy.
Both of them are used to boost your hormone levels, but HRT only supplements the hormones that your body is already producing, while birth control pills completely suppress the production of hormones and replace them altogether.
Birth control pills are not used for contraception only. Your doctor might prescribe them to you if you're going through perimenopause and your fluctuating hormones are causing health problems. In this case, HRT might do more harm than good because your body still produces high amounts of estrogen and progesterone.
Which treatment is best suited for you will depend on a number of factors such as age, whether or not you're perimenopausal, your estrogen level, etc.