Zinaman, M., & Stevenson, W. (1991). Efficacy of the symptothermal method of natural family planning in lactating women after the return of menses. American journal of obstetrics and gynecology. https://doi.org/10.1016/s0002-9378(11)90575-4
Zinaman M, Stevenson W. Efficacy of the symptothermal method of natural family planning in lactating women after the return of menses. American journal of obstetrics and gynecology. 1991. doi:10.1016/s0002-9378(11)90575-4
Zinaman, Michael, and Wilma Stevenson. "Efficacy of the symptothermal method of natural family planning in lactating women after the return of menses." American journal of obstetrics and gynecology, 1991.
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Abstract
This study was designed to determine the efficacy of the symptothermal method of natural family planning during lactation. Although the method appears to give a reasonable reflection of fertility potential over time, it overlaps with the profound influence of lactation in both ovulation suppression and the delay of luteal phase adequacy. Further analysis is planned to attempt to identify those particular mucus signs and symptoms that are helpful during the transition from lactational amenorrhea to normal cycling.
