If you do not use contraception during intercourse, you may not necessarily get pregnant, and you need to have intercourse around the time of ovulation to get pregnant. In addition to the need to have intercourse at the time of ovulation, a woman’s normal conception will be affected by many factors. If a woman has a large area of cervical erosion, resulting in a thick secretion, it can affect the passage of sperm and lead to difficulties in fertilization. If a woman has adhesions in the uterine cavity or submucosal fibroids, the internal environment of the uterine cavity will be altered, which will affect the fertilization of the egg and also cause difficulty in conception. Tubal impassability or incomplete fallopian tubes due to various reasons can affect the transportation of sperms and eggs, which can also affect pregnancy. Female endocrine metabolic abnormalities, such as abnormal function of the gonadal axis, thyroid and adrenal gland function, can affect the normal implantation of the fertilized egg, thus causing difficulties in conception.