
A missed period with a negative pregnancy test can happen because of delayed ovulation, stress, hormonal changes, PCOS, thyroid problems, changes in body weight, or

A Free T4 test is a blood test that measures the amount of unbound thyroxine circulating in the blood. Thyroxine, also called T4, is one

A TSH test is a blood test that helps assess how well the thyroid gland is functioning. Thyroid problems can affect menstrual periods, ovulation, fertility

Irregular periods can be caused by hormonal changes, stress, polycystic ovary syndrome (PCOS), thyroid problems, changes in body weight, pregnancy, breastfeeding, or approaching menopause. Sometimes