PIP: An awareness of ovulation pain and the occurrence of premenstrual swelling of the breasts have been cited as methods of self-detection of ovulation and the ensuing fertile period. While these are part of the cervical mucus method and are occurrences which the woman herself can detect, so are the procedures which form the basis of the basal body temperature method and Ogino's method. The rate of utilization of these methods was examined in 408 women. 79% of the subjects had heard of Ogino's method, 15% were uninformed about it, and 7% did not respond. Only a few of those women who practiced it, however, did so correctly. There were 58% who had used the basal body temperature method, 40% who had not, and 2% who did not respond. A few of the women in this group used this method continuously. As many as 61% of the women did not respond to the question concerning the check for cervical mucus; the implication here is little interest in the method. When these subjects were excluded, 65% were aware of changes in the vulvar region, especially the sensation of moistness. Premenstrual swelling of the breasts was present in 47% and absent in 46%, with no response made by 7%. 37% of the women experienced ovulation pan, 52% did not, and 11% did not respond. Of the group who did experience ovulation pain, 6% had what they considered distinct pain. 27% of the women desired to utilize natural family planning, 8% did not, and 46% were undecided; 19% gave no response. There were more affirmative responses than negative ones. (author's modified)