Iodine & selenium

Iodine: Moderate-to-severe deficiency was associated with a 46% lower per-cycle chance of conceiving in a population-based study of 467 women. 28% of iodine-deficient women hadn’t conceived by 12 months vs. 12.5% of iodine-sufficient women. Many prenatal vitamins contain iodine, but not all — check your label.

Selenium: A combined selenium + vitamin E supplement significantly increased AMH, antral follicle count, and ovarian volume in an RCT of women with occult premature ovarian insufficiency. Selenium also has strong data for reducing thyroid autoantibodies (TPO).

Both are especially relevant post-hormonal-contraception, as OC use reduces selenium status.