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Why does basal body temperature increase in the luteal phase?

By Silvia Azaña Gutiérrez B.Sc., M.Sc. (embryologist).
Last Update: 03/27/2024

In the luteal phase, the ovarian corpus luteum is responsible for producing progesterone. Increased levels of this hormone are responsible for the fact that, after ovulation and during the luteal phase, the woman's basal body temperature rises by 0.3-0.5 orC.

Some women use this method to estimate when ovulation has occurred and when they have entered the luteal phase. To do this, the basal temperature should be measured every day of the cycle before getting out of bed and with the same thermometer. In this way, with the recording of temperatures, the woman could detect the increase in her basal body temperature.

 Silvia Azaña Gutiérrez
Silvia Azaña Gutiérrez
B.Sc., M.Sc.
Embryologist
Graduate in Health Biology from the University of Alcalá and specialized in Clinical Genetics from the same university. Master in Assisted Reproduction by the University of Valencia in collaboration with IVI clinics.
License: 3435-CV
Embryologist. Graduate in Health Biology from the University of Alcalá and specialized in Clinical Genetics from the same university. Master in Assisted Reproduction by the University of Valencia in collaboration with IVI clinics. License: 3435-CV.