The normal follicle is above 1.8 centimeters, if below 1.8 centimeters, this is considered no advantageous follicle, follicle 1.2 centimeters and then intercourse, this time the chance of pregnancy is very low. This is because such a follicle is not mature, even if you get pregnant, there may be miscarriage or pre-miscarriage, or even there may be a chance of stopping the development of a chance of pregnancy, and the chances of getting pregnant in this case is also very low. You can buy an early pregnancy test about 12 days after intercourse to rule out the possibility of pregnancy, as far as possible in the next month for continuous monitoring, to see if the follicle has reached maturity to rupture, if the follicle ruptures at maturity, then there is not too much of a problem, and will not affect the pregnancy. However, if the follicles rupture at less than 1.8 centimeters each time, there will be follicular dysplasia and ovarian hypoplasia. It is recommended to take blood tests for anti-mullerian hormone to rule out ovarian function, and according to the situation, you need to take some oral medications to promote follicular development.