How effective is levonelle if taken at day 13 of your menstrual cycle?
Where you are in your menstrual cycle is irrelevant, how long you take it after unprotected sex is. It must be taken no later than 72 hours after unprotected sex. It’s more effective the sooner you take it. Levonelle is 95% effective when taken within 24 hours of having unprotected sex, 85% effective between 25 – 48 hours and 58% between 49 – 72 hours. Ignore the Nurse, she was talking nonsense, she’s got herself confused. It does different things according to where you are in your menstrual cycle; however where you are in your menstrual cycle does not increase or decrease efficacy. The drug can prevent an egg from being released, prevent sperm from fertilising an egg (if it has already have been released) and it might be able to prevent a fertilised egg from attaching itself to the lining of the womb.
