Which hormone works alongside Follicle-stimulating hormone and is important for testosterone production in men?

The hormone that works alongside Follicle-stimulating hormone (FSH) and is crucial for testosterone production in men is luteinizing hormone (LH). LH is produced by the pituitary gland and plays an essential role in the male reproductive system by stimulating the Leydig cells in the testes to produce testosterone.

Testosterone is vital for various functions in the male body, including the development of secondary sexual characteristics, maintenance of libido, and support of spermatogenesis. While FSH also contributes to male reproductive functions by promoting sperm production, LH is specifically responsible for regulating testosterone synthesis.

In contrast, oxytocin and estrogen are not directly involved in the regulation of testosterone production in men. Oxytocin is primarily associated with childbirth and lactation, while estrogen, although present in males, has different roles that do not include the stimulation of testosterone synthesis in men. Thus, the correct association of luteinizing hormone with FSH in the context of testosterone production solidifies its importance in male endocrine function.