ovulation, release of a mature egg from the female ovary; the release enables the egg to be fertilized by the male sperm cells. Normally, in humans, only one egg is released at one time; occasionally, two or more erupt during the menstrual cycle. The egg erupts from the ovary on the 14th to 16th day of the approximately 28-day menstrual cycle.

Ovulation is a process in which a mature egg is released from the ovary, pushed down the Fallopian tube and is available to be fertilized. Menstruation is the periodic discharge of blood and mucosal tissue from the inner lining of the uterus through the vagina.

Why do I need a TSH test? You may need a TSH test if you have symptoms of too much or too little thyroid hormone in your blood. Hyperthyroidism (too much thyroid hormone) is also called overactive thyroid. Having more thyroid hormones than you need speeds up your body functions and causes symptoms that include:

What Is a TSH Test? Traci C. Johnson, MD A TSH test is done to find out if your thyroid gland is working the way it should. It can tell you if it’s overactive ( hyperthyroidism) or underactive (.

I always look for “optimal ranges” as opposed to “normal ranges” and with thyroid level, there’s a very tight range of optimal. The “normal range” for TSH is generally considered 0.2 – 4.5, but there are studies that show the body does not function properly when TSH rises above 2.5.

The first blood test typically done to diagnose hypothyroidism measures the level of thyroid-stimulating hormone (TSH) in the blood. If it's high, the test is done again, along with a blood test for the thyroid hormone T-4. If the results show that TSH is high and T-4 is low, then the diagnosis is hypothyroidism.

Lastly, it is important to understand that normal ranges are calculated based on the 2.5 th to 97.5 th percentiles of the distribution of values measured in the population tested. Therefore, 2.5% of people with completely normal thyroid function will have a TSH slightly below the listed normal range (and 2.5% slightly above the normal range).

Tests to evaluate thyroid function include the following: TSH TESTS. The best way to initially test thyroid function is to measure the TSH level in a blood sample. Changes in TSH can serve as an “early warning system” – often occurring before the actual level of thyroid hormones in the body becomes too high or too low.