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Four points on the basal body temperatures (BBT) curve have been correlated with the estimated time of ovulation (ETO), as determined by indirect hormonal parameters, in 74 menstrual cycles from 24 subjects. Only 10 of 66 hormonally
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Natural family planning. II. Basal body temperature and estimated time of ovulation.
Hilgers TW et al., 1980
Hilgers TW, Bailey AJ
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