Thanks for the query to ATD,
Yes, in a cycle length of 21-23 days, her ovulation shall occur by mid cycle and hence by day 10-day 13, which is when you have had sex. This was her fertile period and hence there are all chances that she ay get pregnant. It is hence suggested that she may opt for an emergency contraceptive pill within 72 hrs of intercourse, that shall help prevent unwanted pregnancy.
I hope I have answered your query in detail,
Wishing you good health,
These Q&A’s are for educational purposes and should not be relied upon as a substitute for medical advice you may receive from your physician. If you have a medical emergency, please call 911. These answers do not constitute or initiate a patient/doctor relationship.