Parasympathetic innervation to the ovaries and testes comes from which nerve(s)?

Parasympathetic innervation to the ovaries and testes comes from which nerve(s)?

• A. Pelvic Splanchnic Nerves
• B. C2-Vagus
• C. S2-4 Pelvic Splanchnic
• D. T10-L2

Answer: (B)

Parasympathetic input to the ovaries and testes comes from the vagus nerve. The parasympathetic fibers originate in the brainstem and travel in cranial nerve X, reaching the gonadal plexus along the gonadal arteries to reach the ovaries and testes. The pelvic splanchnic nerves (S2–S4) supply parasympathetic fibers to pelvic organs, but not the gonads themselves. The outflow from T10–L2 is sympathetic, not parasympathetic, so that option isn’t correct. The key point is that the vagus provides the parasympathetic supply to the gonads.

Parasympathetic input to the ovaries and testes comes from the vagus nerve. The parasympathetic fibers originate in the brainstem and travel in cranial nerve X, reaching the gonadal plexus along the gonadal arteries to reach the ovaries and testes. The pelvic splanchnic nerves (S2–S4) supply parasympathetic fibers to pelvic organs, but not the gonads themselves. The outflow from T10–L2 is sympathetic, not parasympathetic, so that option isn’t correct. The key point is that the vagus provides the parasympathetic supply to the gonads.