What does cervical mucus plug mean?

Under the influence of ovarian hormones, cervical gland cells secrete mucus, and then its physical properties, chemical form and quantity, there are periodic changes, forming a jelly-like mucus plug, in the case of elevated estrogen levels, this secretion is increased, mucus is thinner, transparent, silk degree increased. If in the second half of the menstrual hormone influence, this mucus plug secretion is gradually reduced, the texture becomes thicker, and it is easier to break when stretched. Therefore, mucus plug in the cervical canal after the formation of a protective effect on the uterine endometrium, in clinical can also be based on the characteristics of mucus plug, to understand what kind of level of ovarian function status.