Thyroid Function Tests
Thyroid function tests measure the levels of thyroid hormones in the blood, specifically Thyroid-Stimulating Hormone (TSH), Triiodothyronine (T3), and Thyroxine (T4). These hormones are essential regulators of the reproductive system.
- TSH (Thyroid-Stimulating Hormone): Produced by the pituitary gland, TSH stimulates the thyroid gland to produce T3 and T4.
- T3 (Triiodothyronine) and T4 (Thyroxine): These hormones regulate metabolism and influence the reproductive system's function.
- LH Surge: A surge in LH levels occurs about 24-36 hours before ovulation, indicating the most fertile period of a woman's menstrual cycle.
- Abnormal LH Levels: Abnormal LH levels can lead to irregular menstrual cycles and anovulation, making it challenging to conceive.
- Regulation of Menstrual Cycle: Estradiol helps regulate the menstrual cycle by promoting the growth of the uterine lining and preparing it for potential implantation of a fertilized egg.
- Ovarian Function: Abnormal estradiol levels, especially when combined with elevated FSH levels, can indicate ovarian dysfunction, such as diminished ovarian reserve or premature ovarian failure.
- Role in Ovarian Function: FSH stimulates the growth and maturation of ovarian follicles, which contain the eggs.
- Elevated FSH Levels: Elevated FSH levels can indicate reduced ovarian reserve, suggesting fewer eggs remaining in the ovaries. This can impact a woman's ability to conceive and may signal the onset of menopause.
- Ovarian Reserve Indicator: AMH levels indicate the quantity of eggs remaining in a woman's ovaries. Low AMH levels may suggest a reduced ovarian reserve, making conception more challenging.
- Reproductive Planning: AMH testing is valuable for reproductive planning, especially for women considering fertility treatments or those who wish to assess their fertility status.
