Removal of the gonads from either males or females, as is commonly done to animals, leads to persistent elevation in LH and FSH. In general, elevated levels of gonadotropins per se have no biological effect. Normal patterns of gonadotropin secretion are absolutely required for reproduction, and interfering particularly with LH secretion is a widely-used strategy for contraception. Oral contraceptive pills contain a progestin progesterone-mimicking compound , usually combined with an estrogen.
As discussed above, progesterone and estrogen inhibit LH secretion, and oral contraceptives are effective because they inhibit the LH surge that induces ovulation.
Another route to suppressing gonadotropin secretion is to block the GnRH receptor. GnRH receptor antagonists have potent contraceptive effects in both males and females, but have not been widely deployed for that purpose.
Antidiuretic Hormone. Updated Send comments to Richard. Luteinising hormone Luteinising hormone is produced by the pituitary gland and is one of the main hormones that control the reproductive system.
Alternative names for luteinising hormone Interstitial cell stimulating hormone; luteinizing hormone; lutropin; LH What is luteinising hormone? How is luteinising hormone controlled? What happens if I have too much luteinising hormone? What happens if I have too little luteinising hormone? Last reviewed: Feb Prev.
Melanocyte-stimulating hormone. Related Glands. Related Endocrine Conditions. Klinefelter's syndrome Polycystic ovary syndrome Turner syndrome Amenorrhoea Premature ovarian failure Female infertility View all Endocrine conditions. Related Hormones. Related Glossary Supplements. Grants Management Contacts. Prior Approvals. Annual Reporting and Auditing. Transfer of a Grant. Grant Closeout. Cancer Training at NCI.
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Your menstrual cycle is irregular. Your periods have stopped. The test may be used to find out if you have gone through menopause or are in perimenopause. If you are a man, you may need this test if: You've been unable to get your partner pregnant after 12 months of trying. Your sex drive is decreased. These include some of the symptoms listed above, as well as: Fatigue Weakness Weight loss Decreased appetite Your child may need an LH test if he or she is does not seem to be starting puberty at the right age either too early or too late.
What happens during an LH levels test? Will I need to do anything to prepare for the test? Are there any risks to the test? What do the results mean? The meaning of your results will depend on whether you are a woman, man, or child. If you are woman, high LH levels may mean you: Are not ovulating. If you are of childbearing age, this may mean you have a problem in your ovaries.
If you are older, it may mean you have started menopause or are in perimenopause. Have polycystic ovary syndrome PCOS. PCOS is a common hormone disorder affecting childbearing women. It is one of the leading causes of female infertility. Have Turner syndrome , a genetic disorder affects sexual development in females. It often causes infertility. If you are woman, low LH levels may mean: Your pituitary gland is not working correctly.
You have an eating disorder. You have malnutrition. If you are a man, high LH levels may mean: Your testicles have been damaged due chemotherapy , radiation, infection, or alcohol abuse.
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