If the follicle reaches 17mm in diameter, it is already a dominant follicle, and most follicles will rupture and expel the egg when they reach about 20mm. In this case, the follicle will rupture and expel the egg after about 1-2 days. It is advisable to have another ultrasound on the 2nd or 3rd day to find out if ovulation has occurred. If fluid is seen in the uterorectal fossa, then it is likely that ovulation has occurred. It is recommended to time intercourse correctly so that the chances of getting pregnant are improved. Most eggs will die after ovulation if they survive for 24 hours without fertilization, and sperm will survive for 2-3 days after they are discharged into the vagina, so it’s important to schedule your sex life properly in order to increase your chances of getting pregnant.