Hypothyroidism occurs when the thyroid does not produce enough thyroid hormones. When these hormones are low, it can affect fertility. Ovulation can be adversely impacted if the hormone levels interfere with the release of an egg. There may also be underlying causes that are contributing to infertility as well.
In women, it is important to check the levels of thyroid hormones and correct them if infertility is a problem. Usually, when hypothyroidism is brought under control, fertility can be restored. If the thyroid issue is treated and fertility is still an issue, other conditions impacting fertility are at work.