What is going on in this chart?
1) No sustained rise in temperature means that ovulation has not occurred.
2) Unprotected sex during the first 5 days of the cycle, and in the evening of days when no cervical mucus is present.
3) Cervical mucus does not reach peak fertility, remains in a sticky, creamy pattern until the end of the cycle.
4) Protected sex during the fertile window. From the first sign of cervical mucus until the end of her cycle. Since ovulation did not occur in this cycle, she has no luteal phase, and no postovulatory infertile days.