<prompt> The Hormone which forms the basis for Basal Body Temperature as a method of detecting ovulation is :EstrogenProgesteroneHCGOxytocin  <response>: This Method is based on the fact that after ovulation, progesterone level in the blood increases Progesterones have a Thermogenic effect, increasing the basal metabolic rate and causing the rise of temperature by 0.5degF the luteal phase. Day of temperature shift indicates the time of ovulation. 