Follicle follicle 20x17mm pregnancy success rate is generally very high, but there are individual differences. Normal mature follicle diameter of 18-22mm between, follicle 20x17mm that is already mature follicle, such as follicle can be normal rupture ovulation, and female fallopian tubes, male semen normal, as long as the reasonable arrangement of sexual life pregnancy chances are relatively high. However, simply having mature follicles does not necessarily mean that you can get pregnant. If there is a situation where you can’t ovulate normally, or the female fallopian tube is not open, or the male semen is not of good quality, then it will affect the woman’s pregnancy, and affect the chances of a normal pregnancy. If you are planning to conceive, it is recommended to monitor the dominance of mature follicles can be reasonable arrangements for sexual life, the general follicle 20x17mm will ovulate in about 12 hours, can be every other day coitus to increase the chances of conception.