When someone starts a new hormonal method of birth control, they need to use a back up method (like condoms or practicing abstinence) for one week before that method will be effective. After that first week, the hormones will be integrated into the body and can help prevent pregnancy up to 99% when taken correctly.
But keep in mind that your birth control is only going to be effective if you’re taking it correctly. Depending on which method you are using, there are special instructions on how to use it so that it’s most effective.
- If you’re on the patch, you need to remember to put a new one on once a week for three weeks and it will be 92-99% effective.
In conclusion, if your partner ejaculates inside of you but you’re taking your birth control correctly, you will be up to 99% protected from pregnancy. If you are not taking it correctly however, effectiveness will go down.
It’s always a good idea to use some type of barrier method (like condoms) in addition to a hormonal method of birth control to help reduce the risk of STI transmission.
If you have additional questions, give us a call at 303-442-5160.