Cervical Mucus is a viscous fluid that plugs the cervical os, and prevents sperm and bacteria from entering the uterus. At midcycle, under estrogenic influence cervical mucus becomes thin, watery, and stringy, and allows free passage of sperm into the uterus.

In most women, the cervical mucus starts out dry after menstruation and then gets sticky, then creamy, then wet and watery, becoming like egg whites as you get closer to ovulation. You may even get different types of cervical mucus throughout the day.
Fertile cervical mucus is a sign that your body is most fertile; having intercourse when you are most fertile will increase your chances of pregnancy. To increase your fertile cervical mucus, a few steps are illustrated right here.