Basal body temperature (BBT) Increase
Gestational timeline: 1st Trimester
Overview
Basal body temperature (BBT): Your basal body temperature (BBT) is your temperature taken first thing in the morning before you get out of bed. It is usually lower than your regular temperature during the day. During pregnancy, your BBT may rise slightly. This is because the production of progesterone increases during pregnancy, which can raise your temperature. A sustained rise in BBT can be a sign of pregnancy, but it is not always reliable. It typically occurs during Weeks 2, 4 (1st Trimester) of pregnancy.
1st Trimester — typically experienced around weeks 4, 2
Gestational Safety & Timeline Grid
This safety grid maps the typical progression and status of basal body temperature (bbt) increase over the 40 weeks of pregnancy.
Related Guides
Learn more about self-care strategies and expected timeline variations with these guides:
- Symptoms
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