Fact Check: During the luteal phase of the menstrual cycle, estrogen levels start to decline.

Claim: During the luteal phase of the menstrual cycle, estrogen levels start to decline.

Verdict: Correct (95% confidence)

Explanation: According to the National Center for Biotechnology Information (NCBI), estrogen levels experience a secondary rise during the mid-luteal phase and then decrease towards the end of the menstrual cycle (Source 2). The PMC article also confirms that after a peak in the mid-luteal phase, estrogen levels decline (Source 1). Flo Health supports this by stating that estrogen levels drop after ovulation, which is part of the luteal phase (Source 5). These sources directly address the claim's core propos...