Rise in body temperature after ovulation is due to :
Progesterone is a thermogenic hormone, causes a shift in the basal body temperatureHence the end of the feile period can be known by measuring daily basal body temperatureThe woman checks her temperature every morning and resumes intercourse 3 days after the thermal shift, the rise in body temperature that signals that the corpus luteum is producing progesterone and that ovulation has occurredRef: Berek and Novak&;s Gynecology; 15th edition; Chapter 10
Estrogen
Progesterone
LH
FSH
Contraception