Pregnancy

Patient: I started period on 13th of this month and had intercourse on 19th and 21st i want to get pregnant what r my chances when will i ovulate normaly i have my periods 3 days before the previous month date means now it is due on 10th or 11th of march.when should i have more intercourse to increase chances we are both healthy and i have 6 years old son also.please answer.

Doctor: