The normal mature follicle is above 1.8cm and the width is also to reach 1.8cm, some women may have poor follicular development quality, although the length has reached 1.8cm, even more than 1.8cm, but the width may still be less than 1.8cm. this time will affect the pregnancy, because normal mature follicle is a big, round, fat and fat follicle, so it will increase the chances of pregnancy. This increases the chances of pregnancy. When monitoring the follicles, as long as possible to grow to about 1.6cm, try to monitor the follicles every day, so that you can always find the follicle changes, in the case of dominant follicles for coitus, coitus and then monitor the follicle as long as the rupture, it will be there with a 60% chance of pregnancy. At the same time, if the follicle quality is not well developed, as far as possible, you should use some ovulation drugs, such as letrozole or clomiphene to promote the growth of follicles, in order to achieve the purpose of a fertilization.