Mirena is a hormone-releasing IUD that releases small amounts of a progestin hormone called levonorgestrel locally into the uterus. Mirena lasts for as long as you want, for up to 5 years. (2016 Pubmed)
Alternatives: Taoists use the Traditional Rhythm Method for birth control in combination with tantric semen retention:
A woman is relatively “safe” from conception during the 7 days prior to and immediately following the first day of menstruation. If as an extra margin of safety we reduce that to 5 days, we then have an 11-day period each month during which pregnancy should not occur. (5751-5753)
Alternative Drugs: Implanon
