Follicles 17x14mm are oval, not round. As long as the follicle can develop to maturity, whether it is oval or round, a mature follicle is about 18-25mm in diameter. 17x14mm means that the follicle is not yet mature, so it is best to have regular pelvic ultrasound to detect the size of the follicle. In the near ovulation period, normally, follicles grow about 2mm per day, so you can review the pelvic ultrasound on day 2 to see if they are mature, only mature follicles can be ovulated. If you are planning to conceive, you can arrange intercourse during the ovulation period, once every other day, which can significantly increase the chance of conception. For women with regular menstrual cycle, ovulation usually occurs 14 days before the next menstrual period. During the preparation period, you should pay attention to rest, quit smoking and drinking, do not stay up late, and take reasonable folic acid supplements, which can promote healthy fetal development and effectively prevent fetal malformations.