Can sex delay a period?

If you get pregnant: Unprotected sex can delay one's period by approximately 9 months by causing pregnancy. Unprotected sex can also allow for sexually transmitted diseases. So always make sure the guy wears a condom (and consider a 2nd form of contraception just in case). But it's doubtful that sexual activity will delay one's menses aside from above scenario.

Not usually: Sex won't delay your period unless it results in pregnancy. In that case you won't have a period for 10 months or so. Otherwise, sex won't delay your period. Best wishes!

No: Having intercourse has no effect on when your cycle starts or stops. Your body's hormones manage that.