A woman can technically determine if she is likely to be pregnant or not on the basis of changes in her cervical mucus. During the menstrual cycle, the cervical mucus changes due to the level of estrogen, progesterone, FSH and luteinizing hormones that occur during the cycle but, once a woman becomes pregnant, new changes in hormones occur. The egg white cervical mucus of ovulation no longer occurs because a woman does not need to ovulate while she is already pregnant.
Your cervical mucus can tell you a lot about what is going on inside your body — hormonally and physically. This is why it is important to keep track of your cervical and vaginal mucus so you can identify problems that may be arising or can identify when you are most fertile. Knowing what is going on with your cervical mucus can be very important, especially when it comes to identifying infections and staging your cervical mucus.