ortho tri cyclen lo?
Exactly how long does it take for ortho tri cyclen lo to have effect and prevent pregnancy?
- 1 decade agoFavorite Answer
As with any new birth control, you need to use a back-up method for at least the first month to be safe.Source(s): mom of 4, #4 due Feb.
- orphan annieLv 51 decade ago
My doctor has always told me with any new birth control, to use a backup method for 1 month to be safe.