Key Takeaways

Women with THC exposure had higher egg maturation rates but more chromosome issues

THC-related egg changes may affect fertility, miscarriage risk and embryos

Cannabis use among pregnant women more than tripled in the U.S. from 2002 to 2020

THURSDAY, Sept. 11, 2025 (HealthDay News) — High levels of THC — the compound in marijuana that causes a “high” — may affect how eggs develop and could lead to fertility problems, miscarriages and chromosome issues in embryos, new research shows.

The findings were reported Sept. 9 in the journal Nature Communications .

Researchers analyzed more than 1,000 samples of ovarian fluid from patients undergoing fertility treatment. They compared unfertilized eggs (oocytes) from 62 women who tested positive for THC with a control group wh

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