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BBT Charting6 min read · June 2026
Implantation Dip on BBT Chart: Real Sign or Myth?
A one-day temperature drop after ovulation is not what most people think.
⚕ Medical Disclaimer: This article is for informational purposes only. Always consult a qualified healthcare provider.
An implantation dip is a single-day drop in basal body temperature that some notice during the luteal phase.
The theory is that it relates to hormonal shifts around implantation, but research does not support it as a reliable indicator.
Many people who conceive never see a dip, and many who see one do not conceive that cycle. Daily temperature fluctuation from sleep, alcohol, or illness is a far more common explanation.
The more reliable BBT sign is a sustained temperature rise that holds for 10 or more days.
Frequently Asked Questions
How common is an implantation dip?
It is not a reliable pregnancy indicator. Many who conceive never see one, and many who see one do not conceive.
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