What is cervical mucus and how do i check for it myself?~

See below: Cervical mucus is a lot like the mucus that is in your nose but its made by the cervix. The cervix is the part of the uterus that is at the top of the vagina. During the time between your periods is changes in appearance and consistency. It can be runny and sticky, or it can be very stringy. You can check it by reaching inside and pulling some out to stretch between your fingers.