Which of the following is not a placental hormone?

Human chorionic gonadotropin (hCG), human placental lactogen (hPL), estrogen, and progesterone are all produced by the placenta. Increased synthesis of these hormones is necessary to promote foetal growth, maternal metabolic alterations, and pregnancy maintenance.

Inhibins are protein hormones consisting of two subunits, α and β, and are secreted mainly by the granulosa cells.