What is going on in this chart?
1) Low temperatures, and increasingly fertile cervical fluid in the follicular (preovulatory) phase.
2) Unprotected sex during the time of peak fertility, while the cervical mucus is very fertile, and before the temperature rises.
3) These higher temperatures indicate that ovulation has occurred. Her luteal phase is currently 20 days long. Luteal phases of more than 18 days, in most cases, indicate pregnancy. This woman is pregnant!