Changes in Cervical Mucus
Cervical mucus is mostly water and serves as the medium through which sperm are transported towards eggs. During ovulation, the changes in the cervical mucus help the sperms remain alive for as long as five days waiting to fertilize an egg.[4]
Hormonal changes during ovulation like the surge in estrogen levels usually cause this mucus to increase in volume and become clearer, much like an egg white. The cervical mucus also gets thinner and more sticky or stretchy.
Increase in Basal Body Temperature
Basal body temperature is also known as resting temperature. [5] It generally refers to your body temperature when you first wake up in the morning. This temperature goes up by almost roughly one degree within a few hours after ovulation has taken place. If your eggs are not fertilized, the temperature will remain elevated until your next cycle. The temperature rise is caused by the release of progesterone to prepare your uterus for implantation following egg fertilization.