[Hormonal control of the ovarian cycle in Labidura riparia (author's transl)]

The ovaries in female Labidura riparia undergo cyclical development. They require approximately 10 days to complete one vitellogenesis. During this period the Insect eats and and also mates. About 7 to 9 follicles in each ovariole are loaded progressively with vitellus and secrete a chorion. Before each oviposition degenerative phenomena appears in immature follicles. The ovaries remain at a less developed stage during the 10 days of maternal eggs cares. The follicles at the base of each ovariole degenerate. The cerebral neurosecretory centers and the corpus allatum are active during each vitellogenesis and inactive during each period when follicles degenerate and when the female cares her eggs. An experimental study shows that neurosecretory centers control the activity of the corpus allatum which itself influences the evolution of the vitellogenesis.