Related Concept Videos
01:23Infertility in Males
Male infertility affects millions of couples worldwide, arising from various factors that impact different stages of the reproductive process. An endocrine imbalance resulting from conditions like hypogonadism, Klinefelter syndrome, or pituitary disorders can disrupt hormone levels and reduce sperm production. Testicular defects, such as tumors, cryptorchidism, atrophic testes, abnormal sperm morphology, and low sperm count or motility, may arise due to genetic factors, structural...
01:22Hormonal Regulation of the Menstrual Cycle
The ovarian cycle regulates endometrial changes throughout a single menstrual cycle via the coordinated action of gonadotrophin-releasing hormone (GnRH) and gonadotrophins.
At puberty, GnRH begins a pulsatile release pattern, which triggers the anterior pituitary gland to secrete follicle-stimulating hormone (FSH) and luteinizing hormone (LH). The frequency and amplitude of GnRH pulses vary across the menstrual cycle, with faster pulses favoring LH release and slower pulses favoring FSH release.
At puberty, GnRH begins a pulsatile release pattern, which triggers the anterior pituitary gland to secrete follicle-stimulating hormone (FSH) and luteinizing hormone (LH). The frequency and amplitude of GnRH pulses vary across the menstrual cycle, with faster pulses favoring LH release and slower pulses favoring FSH release.
01:40Hormonal Regulation
Hormones regulate a significant portion of digestion through activation of the neuroendocrine system. The neuroendocrine system of digestion contains many different hormones all with multiple functions that are both, directly and indirectly, involved in digestion.
01:33Hormonal Regulation
The renin-aldosterone system is an endocrine system which guides the renal absorption of water and electrolytes, thus managing blood pressure and osmoregulation. Activation of the system begins in the kidneys with a small cluster of cells adjacent to the afferent and efferent blood vessels of the renal corpuscle. As the nephrons are filtering blood, juxtaglomerular cells monitor blood pressure. If they detect a decrease in pressure, they release the hormone renin into the bloodstream.
01:26Testosterone: Functions and Regulation
The intricate hormonal interplay essential for male reproductive health begins with the release of gonadotropin-releasing hormone (GnRH) by the hypothalamus. This hormone prompts the pituitary gland to secrete follicle-stimulating hormone (FSH) and luteinizing hormone (LH). LH targets the Leydig cells in the testes, stimulating them to produce and release testosterone. In concert with testosterone, FSH acts on the Sertoli cells within the seminiferous tubules to facilitate the release of...
01:28Infertility in Females
Female infertility is defined as the inability to conceive after a year of regular, unprotected intercourse and affects about 10–15% of couples worldwide. The primary cause of female infertility is ovulatory disorders, which hinder the release of eggs. These disorders can be classified as hypothalamic amenorrhea, polycystic ovarian syndrome (PCOS), premature ovarian failure, and hyperprolactinemic anovulation disorders.
Endometriosis, a condition characterized by abnormal growth of endometrial...
Endometriosis, a condition characterized by abnormal growth of endometrial...
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Treatment Model for Young Patients with Psychogenic Erectile Dysfunction and Resultant Infertility
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[Hormonal evaluation in infertile men].
N Bourcigaux1, S Christin-Maître
1Service d'endocrinologie de la reproduction, EA 1533, faculté Paris-VI, hôpital Saint-Antoine, Assistance publique-Hôpitaux de Paris (AP-HP), 184, rue du Faubourg-Saint-Antoine, 75571 Paris cedex 12, France.
Gynecologie, Obstetrique & Fertilite
|May 9, 2008
Summary
Hormonal testing helps identify treatable causes of male infertility. Measuring hormones like FSH and testosterone can diagnose conditions such as hypogonadotropic hypogonadism and testicular insufficiency.
Area of Science:
- Endocrinology
- Reproductive Medicine
- Urology
Context:
- Male infertility affects a significant portion of couples seeking reproductive assistance.
- Hormonal imbalances are a key factor in male reproductive health.
- Clinical guidelines recommend specific hormonal assessments for infertile men.
Purpose:
- To outline the indications for hormonal testing in infertile men.
- To detail the specific hormones to be measured based on clinical presentation.
- To differentiate between various causes of hypogonadism.
Summary:
- Hormonal testing is crucial for screening treatable causes of male infertility.
- Serum follicle-stimulating hormone (FSH) and testosterone levels should be measured in men with low sperm concentration, sexual dysfunction, or signs of endocrinopathy.
- Further testing including luteinizing hormone (LH) and prolactin is indicated for low testosterone to distinguish hypogonadotropic hypogonadism from testicular insufficiency.
Impact:
- Provides a clear diagnostic pathway for clinicians evaluating male infertility.
- Facilitates timely and accurate diagnosis of hormonal causes of infertility.
- Enables targeted treatment strategies for improved reproductive outcomes.