Yes, the cervical secretion, cervical mucus, undergoes changes throughout the menstrual cycle.
In the pre-ovulatory phase, the cervical mucus is not very abundant and very viscous. However, in the ovulatory phase, this secretion is more abundant, thin (it stretches up to 10 cm when placed between two fingers) and transparent. Thus, near ovulation, the cervical mucus resembles raw egg white. Finally, in the postovulatory phase, the cervical secretion becomes thin and viscous again.