I had sex before the 10th of this month, why didn't my period come by the 10th?

Patient's question:

No

Doctor's answer:

If menstruation is delayed or advanced by one week or less, it is normal. With a history of sexual activity, if menstruation is delayed by more than one week, the first step is to use a pregnancy test to rule out pregnancy. Stress, cold exposure, environmental changes, or endocrine disorders can all cause delayed menstruation.