Yes. During breastfeeding a woman may experience a time of natural infertility. This time, however, is variable for every woman and for every pregnancy. This time of

infertility depends upon the inter-relationship of many factors including the baby and mother's needs, and the style and frequency of feeding. With the help of a certified Billings Ovulation Method teacher, a breastfeeding woman can determine her pattern of infertility after two weeks of charting.

Because the Billings Ovulation Method only has four rules for postponing/avoiding pregnancy, couples simply apply those rules according to where the woman is in her cycle.