Your doctor may request that you have samples of blood drawn each day for several days. Because the amount of LH in the blood varies with your menstrual cycle, a few samples may be necessary to get an accurate measurement of your LH levels. The needle site may bruise afterwards, but if you put pressure on it with a bandage, you can reduce this possibility. Phlebitis , while rare, may occur when blood is drawn. This is when the vein becomes inflamed after blood is taken.
If it occurs, your healthcare provider will likely have you apply a warm compress to the vein throughout the day. If you have any kind of bleeding disorder, make sure to tell your doctor to avoid complications from having blood drawn.
Your doctor should give you exact directions to prepare for your blood test. You may be told to stop taking certain medications that can affect the results, so be sure to inform your doctor of all medications and supplements you take. Your doctor will also want to know the date of your last period. As with many blood draws, you may be asked to avoid eating or drinking for up to eight hours leading up to the test.
These substances can interfere with the results of your test. Your doctor can tell you when results of your test will be available and will discuss the meaning of your levels with you. While each result can vary based on your unique condition, some general interpretations of LH results can include the following. This is known as primary ovarian failure. Some causes of primary ovarian failure can include:.
This means another part of your body causes ovarian failure. In many cases, this is the result of problems with the areas of your brain that make hormones, such as the pituitary gland. The causes of this condition can include:. Secondary testicular failure can also be due to a brain-related cause, such as a disorder in the hypothalamus.
Also, if your doctor has given you the GnRH shot and your LH levels went down or stayed the same, a pituitary disease is often to blame. Low levels of LH in adult males may lead to low testosterone levels , potentially causing such symptoms as:. For children, high levels of LH can cause early puberty.
This is known as precocious puberty. Underlying causes of this can include:. Testing LH has the potential to indicate a number of development- and fertility-related disorders. If your doctor suspects you may have a condition that affects the ovaries, testicles, or the parts of the brain that make LH, the test can provide more information.
The FSH test looks at the level of the hormone in…. FSH is Follicle Stimulating Hormone, and it is produced by the brain via the pituitary gland to stimulate follicles in the ovary to grow.
E2 is the steroid hormone that is produced by the cells lining the ovarian follicles in response to FSH, and the very high levels of E2 within the leading follicle nourish and mature the egg. Some E2 reaches the blood to cause the lining of the uterus to grow, the secretion of ovulatory cervical mucus, and to provide feedback to the brain and pituitary that another cohort of follicles has been recruited and is growing.
The level of FSH then falls due to negative feedback by E2. At this time, E2 is at its lowest so FSH should be at its highest. This commonly happens in older women. From a functional point of view, early follicle growth may mean the endometrium does not have enough time to develop before ovulation occurs, leading to asynchronicity between the egg and the endometrium , and hence a reduced chance of implantation. Having a blood test with a needle carries some risks.
These include bleeding, infection, bruising, and feeling lightheaded. When the needle pricks your arm or hand, you may feel a slight sting or pain. Afterward, the site may be sore. Being pregnant or taking birth control pills may affect the results of this test. Some medicines may also affect the results. You don't need to prepare for this test. But be sure your healthcare provider knows about all medicines, herbs, vitamins, and supplements you are taking.
This includes medicines that don't need a prescription and any illegal drugs you may use. Search Encyclopedia. Follicle-Stimulating Hormone Does this test have other names? FSH What is this test? Why do I need this test? Some conditions that may be checked with this test include: Ovarian failure in women Testicular failure in men Early or late puberty in children Fertility problems in men and women What other tests might I have along with this test?
What do my test results mean? Normal results of this test for men are: 1.
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