Artis Cantik. Cervical mucus does not stay the same throughout the menstrual cycle. When we're ovulating, cervical secretions will become clearer and more slippery than it was in the early stages of the menstrual cycle. So, our success in determining the fertile days we depend on our ability to analyze our cervical secretions to determine changes. Mucus is also very important. Protect the sperm cells and then bring them safely to the fallopian tube where fertilization will occur. we also will find our fertile days with our basal temperature record. During ovulation, basal body temperature increases a woman. we also can determine the best time for conception take place by taking note of the position of the cervix. The cervix moves up during ovulation