which birth control has higher estrogen released mirena or loestrin 24 pills?

Not medical advice: Loestrin 24 FE releases more estrogen than Mirena. Mirena doesn’t actually release any estrogen.

Loestrin 24 FE tablets contain 1 mg norethindrone acetate and 20 mcg ethinyl estradiol. The norethindrone acetate is a progestogen or synthetic progesterone. Progesterone is a hormone that occurs naturally in females and regulates ovulation and menstruation. The ethinyl estradiol is an estrogen. Naturally produced estrogens are also involved in controlling the menstrual cycle.

Mirena is an intrauterine levonorgestrel birth control system that is effective for 5 years. When first administered, Mirena releases 20mcg of levonorgestrel per day. The dosage decreases slowly until the end of its 5 year use at which point it is releasing 10mcg of levonorgestrel. Levonorgestrel is a progestogen like the norethindrone found in Loestrin 24 FE.

A recent study has found IUDs to be more effective than birth control pills and condoms. The use of IUDs has been found to be so effective that it has been compared to temporary sterilization.