BBT Rise Before Ovulation: What It Means
A complete guide to reading your BBT chart.
Your basal body temperature (BBT) is your temperature at complete rest. Tracking it daily reveals a clear pattern throughout your cycle.
The thermal shift signals ovulation — typically 0.2 to 0.5 degrees above your pre-ovulation baseline. This happens because progesterone raises body temperature after ovulation.
Always take your temperature at the same time each morning before getting out of bed. Alcohol, illness, and poor sleep all affect readings.
Use our AI BBT Interpreter to analyze your chart in plain English — no medical degree needed.
Frequently Asked Questions
How much does BBT rise after ovulation?
Typically 0.2 to 0.5 degrees above your pre-ovulation average, sustained for at least 3 days.
Does BBT rise before or after ovulation?
BBT rises after ovulation, triggered by progesterone. You can only confirm ovulation after it has happened.