Undiagnosed and untreated thyroid conditions are identified as a major cause of infertility among women of reproductive age. And as per estimates over 20 per cent women in India live with an undiagnosed thyroid problem. Thyroid is a small butterfly-shaped gland in the neck that produces thyroid hormones which regulate your body's metabolism. Thyroid disorders are conditions that arise when this gland produces too much (hyperthyroidism) or not little (hypothyroidism) of these hormones. Women are four times more susceptible to thyroid disorders than men. Thyroid problem and infertility According to experts low levels of thyroid hormone can interfere with ovulation