2 doctors weighed in:

29 day regular menstrual cycle, day 18 had unprotected sex, took levenelle 17-18 hours after . Should this protect from unwanted pregnancy?

2 doctors weighed in
Dr. Robert Kwok
Pediatrics
1 doctor agrees

In brief: Sure

Levonelle, a morning-after pill, should work well taken the day after sex.
However, as the saying goes, nothing is certain in life except for death and taxes. So, even if effectiveness was 99%, that would mean 1 out of 100 women in the same situation would become pregnant. If no regular period comes next cycle, one can do a urine pregnancy test. Also, rely on an additional birth control method.

In brief: Sure

Levonelle, a morning-after pill, should work well taken the day after sex.
However, as the saying goes, nothing is certain in life except for death and taxes. So, even if effectiveness was 99%, that would mean 1 out of 100 women in the same situation would become pregnant. If no regular period comes next cycle, one can do a urine pregnancy test. Also, rely on an additional birth control method.
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