The morning after pill and still becoming pregnant what harm can it cause on baby?

No harm: When taken correctly, the emergency contraceptive pills usually prevent pregnancy. If you do get pregnant, having used the emergency contraceptive pill will not harm you or the pregnancy.

No worries.: Don't burden your conscience - Plan B does not cause birth defects (it would have hardly been fda approved otherwise). Take Folic Acid 1-5 mg daily!