Myths vs facts: Östradiol and fertility

Estradiol is a key hormone for female fertility, but many myths surround it. **Fact:** Estradiol drives follicular growth and endometrial proliferation. Optimal levels are critical for oocyte maturation and implantation. **Myth:** 'More estradiol equals better fertility.' This is false. Excessively high levels (e.g., in ovarian hyperstimulation) can impair oocyte quality and disrupt ovulation. Estrogen dominance may also hinder conception. **Fact:** Estradiol levels fluctuate throughout the menstrual cycle; a single measurement is not informative. The dynamic interplay with FSH, LH, and progesterone matters. **Myth:** 'Estradiol testing alone is sufficient for fertility assessment.' No, it is only one piece of the puzzle. The evidence base is strong (human-strong), but interpretation requires clinical context. For fertility workup, comprehensive hormone panels and imaging are necessary. Consumer hormone tests can provide clues but cannot replace medical evaluation.