Thyroid Disease is relatively common and refers to any disorder of the thyroid gland. The thyroid is located in the base of the neck on both sides of the lower part of the larynx and upper part of the trachea. In some cases of disease, the gland becomes noticeably enlarged. The thyroid has a crucial role in the body’s metabolism. Thyroid disease can cause female infertility by resulting in anovulation (lack of ovulation) and menstrual irregularity, luteal phase defect, and hyperprolactinemia.

Men with thyroid disease can have resulting low sperm count and reduced sperm motility. Generally, women with Hashimotos, Thyroiditis (a kind of hypothyroidism) appear to have a slightly higher than normal risk of miscarriage.