Weschler, T. (2015). Taking charge of your fertility: The definitive guide to natural birth control, pregnancy achievement, and reproductive health.
Kelly G. (2006). Body temperature variability (Part 1): a review of the history of body temperature and its variability due to site selection, biological rhythms, fitness, and aging. Alternative medicine review : a journal of clinical therapeutic, 11(4), 278–293.
Join our Newsletter for charting tips, updates and offers.