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Circulating kisspeptin levels in men and women. Kisspeptins (KPs) are detected in the human plasma. Sex specific events, such as neonatal testosterone surge in males and pregnancy in females, can affect the plasma KP levels. KP levels also change with increasing age but exhibit significant sexual dimorphism after puberty. In both men and women, the highest KP levels are detected during puberty and thereafter, plasma KP levels decrease with aging.
