Luteinizing Hormone Function

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  • 1. Luteinizing Hormone FunctionUnderstanding Luteinizing hormonehttp://lhhormone.orgMandy asks…Which hormone is incorrectly paired with its function?A:follicle stimulating hormone–regulates the development of sperm and eggs and production ofsex hormonesB:prolactin–stimulates the production of breast milkC:luteinizing hormone–regulates the production of thyroid hormonesD:oxytocin–simulates contractions during childbirth and the release of breast milk when breastfeedingPregnancy Advisor’s answers:C is wrong.Luteinising hormone’s function in females is to stimulate ovulation and development of thecorpus luteum, and in males, its function is stimulating the production of testosterone.Good luck! 1/8
  • 2. Lizzie asks…10 Points – The function of the corpus luteum is to: …. (MultipleChoice)?a) Help maintain the endometriumb) Produce human chorionic gonadotrophin (HCG).c) Produce more follicle-stimulating hormone (FSH).d) Secrete luteinizing hormone (LH).Thanks in advance to everyone who answers.Pregnancy Advisor’s answers:99% sure the answer is A. The corpus luteum plays a vital role in maintaining pregnancy, andthe endometrium is a membrane in the uterus.The corpus luteum inhibits the secretion of LH and FSH, and therefore cannot be C or D. I thinkB is a red herring. 2/8
  • 3. Nancy asks…hat is the function of human chorionic gonadotropin (hCG)?a. hCG stumulates the uterus to secrete estrogenb. hCG maintains the corpus luteum so it can secrete progesteronec. hCG stumulates the placenta to secrete progesteroned. hCG stimulates the hypothalamus to secrete luteinizing hormonePregnancy Advisor’s answers:B. HCG maintains the corpus luteum so it can secrete progesteroneSecretion of hCG begins long before the placenta begins forming.Donna asks… 3/8
  • 4. Reproductive System help….?1.) Name the source and target of luteinizing hormone (LH) in the female.2.) List two characteristics of the endometrium of the uterus during the second half of themenstrual cycle.3.) Name two parts of a mature sperm and state one function of each4.) What gland is the source of luteinizing hormone (LH)?5.) What is the function of luteinizing hormone (LH) during the last half of the ovarian cycle(days 15 to 28)?Pregnancy Advisor’s answers:1) LH is secreted by the anterior pituitary controlled by the gonadotropin releasing hormone. Ittargets the ovarian follicle and the corpus luteum.2) The endometrial glands are actively secreting glycogen to develop a lush endometrial liningthat is richly vascularized, thickened and glycogen-filled tissue3) A mature sperm contains an acrosome which is an enzyme filled vesicle used to penetratethe ovum. A mature sperm also contains a midpeice which has mitochondria as a source ofenery for the sperm4) Anterior Pituitary Gland.5) LH maintains the corpus luteum which secretes both progesterone and estrogen after the LHsurge, which triggers ovulation. 4/8
  • 5. Lisa asks…My doctor said I have PCOS but I don’t agree! [please help]?My doctor thinks I have PCOS.But I looked up the symptoms and I don’t have alot of them, but I do have some.I also seen that they say the ovaries are larger then normal and there are groups of follicleson/in the ovary. The doctor that diagnosed me with PCOS has never seen what my ovaries looklike… I think he just automatically assumed I have PCOS due to my high levels of testosterone.I’ve had an ultrasound done of my ovaries/uterus many times (by another doctor) and they’venever said anything about PCOS. They’ve never even said they are larger then normal. I dohowever have a cyst on one of my ovaries that comes and goes.I put beside the list of symptoms which ones I have:Multiple ovarian cysts (No, just one.)Irregular or absent menses (Yes my period is irregular but I get it ever month)Infertility (Yes, but I’ve been pregnant twice – both miscarriages.)Acne (No, but I do sometimes get spurts of pimples here and there)Obesity or inability to lose weight (No, I’m under-weight)Excessive body or facial hair (Some what. But I am italian.)Insulin resistance and possibly diabetes (No.)Thinning of scalp hair (Yes, but due to Alopecia Areata)Velvety, hyperpigmented skin folds (No.)High blood pressure (No.)Polycystic ovaries that are 2-5 times larger than healthy ovaries. (No.)Multiple hormone imbalances, commonly including:Androgens testosterone (Yes.)Cortisol (No.)Estrogens (No.)FSH (follicle stimulating hormone) (No.)Insulin. (No.)LH (luteinizing hormone) (No.)progesterone (No.)Prolactin. (No.)Thyroid hormones. (No.) 5/8
  • 6. Impaired lung function. (No.)Sleep apnea. (No.)Fatty liver degeneration (No.)Do you think I could still have PCOS or did he just diagnose me with that due to my high levelsof testosterone?Also, what else could be causing my high levels of testosterone if I dont have PCOS???Pregnancy Advisor’s answers:I think the doctor, as you suspected, was probably looking for the easy answer and did not digat all below the surface.High testosterone can come come many reasons and the diagnosis of PCOS should come afterother diseases are firmly ruled in or out – so just looking at one test is pretty useless.I would find another doctor and get more testing. Just for your information, testosterone can beeffected mainly by cortisol, LH, FSH, thyroid, DHEA sulfate, estradiol and SHBH. Testosteronecan come from estrogen and from DHEA so the other hormones must be tested.The fact that you have alopecia means that you likely do have some sort of hormonalimbalance. I would see an endocrinologist.Jenny asks… 6/8
  • 7. help edoptions please?1).Which of the following organs functions in both the reproductive and urinary systems?A:bladderB:semenC:urethraD:fallopian tubes2).Fertilization usually occurs in the _____.A:ovariesB:fallopian tubesC:uterusD:penis3).What is an embryo?A:a fertilized eggB:the term applied to a fetus, from the time of fertilization until it reaches the end of the eighthweek of gestationC:the term applied to a fetus, from the ninth week of fertilization, through to deliveryD:the organ where a fetus is conceived and then develops, until birth4).Which hormone is incorrectly paired with its function?A:follicle stimulating hormone–regulates the development of sperm and eggs and production ofsex hormonesB:prolactin–stimulates the production of breast milkC:luteinizing hormone–regulates the production of thyroid hormonesD:oxytocin–simulates contractions during childbirth and the release of breast milk when breastfeedingPregnancy Advisor’s answers:1).Which of the following organs functions in both the reproductive and urinary systems?C:urethra“In males, the urethra carries semen as well as urine.”2).Fertilization usually occurs in the _____.C:uterus” It is within the uterus that the fetus develops during gestation.”3).What is an embryo? 7/8
  • 8. B:the term applied to a fetus, from the time of fertilization until it reaches the end of the eighth week of gestation. 4).Which hormone is incorrectly paired with its function? C:luteinizing hormone–regulates the production of thyroid hormones In females, an acute rise of LH triggers ovulation and development of the corpus luteum. In males, it stimulates Leydig cell production of testosterone. Powered by Yahoo! Answers Answering Your Questions on LH Surge http://LHSurge.org Luteinizing Hormone Function 8/8Powered by TCPDF (www.tcpdf.org)