Early in pregnancy, changes in cervical mucus can vary considerably from woman-to-woman, with some reporting thick and sticky mucus and others having thin and watery mucus, according to Alyssia Granger for ConceiveEasy. As pregnancy progresses, most women have an increased amount of cervical mucus discharge.
When an early pregnancy is suspected, changes in cervical mucus can include a slightly pink, red or brown discharge, explains Granger. Called implantation bleeding, this light bleeding occurs as the fertilized egg attaches to the uterine wall. Because it is often very close to the start of a regular menstrual period, this light bleeding and cervical mucus change is sometimes mistaken for a menstrual cycle. The only way to accurately confirm pregnancy is by using a home pregnancy test or taking a test in a doctor's office.
Cervical mucus is used in the woman's body as a conduit, allowing sperm to travel through the fallopian tubes to fertilize an egg when it is thin and watery, notes Granger. When menstruation begins, cervical mucus becomes thick and works to form a barrier to prevent sperm from gaining passage as the body readies itself for ovulation again. Changes in cervical mucus throughout the month can be used to help conceive a baby by pinpointing when ovulation occurs.