Thyroid dysfunction and thyroid autoimmunity in euthyroid women in achieving fertility.

OBJECTIVE : Thyroid disease is the second most common endocrine condition in women of childbearing age. Thyroid hormones are involved in control of menstrual cycle and in achieving fertility affecting the actions of follicle- stimulating hormone and luteinizing hormone on steroid biosynthesis by specific triiodothyronine sites on oocytes; therefore, affect all aspects of reproduction. It remains controversial if preg - nant women should be screened for thyroid dys - function.