Follicle-Stimulating Hormone (FSH): Function and Testing
Follicle-stimulating hormone is a pituitary hormone that supports ovarian follicle development, sperm production, puberty, menstrual cycles, and fertility.
Retrograde Ejaculation: Causes, Symptoms, and Fertility
Retrograde ejaculation occurs when semen enters the bladder during orgasm instead of leaving through the penis, often causing little visible semen.
Ejaculatory Dysfunction: Types, Causes, and Treatment
Ejaculatory dysfunction includes ejaculation that is early, delayed, absent, painful, weak, or directed backward into the bladder.
Ejaculatory Duct: Anatomy, Function, and Obstruction
The ejaculatory ducts are paired tubes that carry sperm and seminal-vesicle fluid through the prostate into the urethra during ejaculation.
Bulbourethral Gland: Function, Fluid, and Sexual Health
The bulbourethral gland releases clear pre-ejaculatory fluid that lubricates the urethra and helps prepare it for semen during ejaculation.
5-Alpha-Reductase Deficiency: Meaning and Development
5-alpha-reductase deficiency is an inherited variation that reduces conversion of testosterone into DHT and may affect genital development and puberty.
Gonadal Dysgenesis: Meaning, Types, and Health Effects
Gonadal dysgenesis is a variation in which the ovaries or testes develop incompletely, affecting hormones, puberty, fertility, or sex characteristics.
Androgen Insensitivity Syndrome: Meaning, Types, and Effects
Androgen insensitivity syndrome is a variation in which an XY body responds partly or not at all to testosterone and other androgens.
Congenital Adrenal Hyperplasia: Meaning, Types, and Effects
Congenital adrenal hyperplasia is an inherited group of conditions affecting adrenal hormone production, salt balance, growth, puberty, and sex development.
Klinefelter Syndrome: Meaning, Symptoms, and XXY Pattern
Klinefelter syndrome is a sex chromosome variation, usually involving an XXY pattern, that may affect testosterone, puberty, fertility, and development.