Juvenile hormone (JH) is a terpene secreted by

Juvenile hormone (JH) is a terpene secreted by Corpora allata.
Juvenile hormones (JHs) are a group of acyclic sesquiterpenoids that regulate many aspects of insect physiology. The first discovery of a JH was by Vincent Wigglesworth. JHs regulate development, reproduction, diapause, and polyphenisms.
Juvenile hormones are secreted by a pair of endocrine glands behind the brain called the corpora allata. JHs are also important for the production of eggs in female insects.
JH secretion by the corpus allatum is regulated by two neurohormones, the allatotropins that stimulate the secretion and the allatostatins that inhibit synthesis.