Copulation occurs within 24 hours of eclosion. Statistically significant infection rates result in abnormal adult eclosion. Early instar larvae hibernate following their eclosion. In addition, they are typically ready to mate within 24 hours of eclosion. The ovaries do not fully mature until three weeks after eclosion. Bursicon is released just after eclosion and induces epidermis cell death. Both of the sexes are sexually mature by the time of eclosion. These mutant flies were also found to display arrhythmic eclosion. The variety of eclosion locations ultimately dictates the male painted lady behaviour. Some organisms reach sexual maturity in a short metamorphosis, such as eclosion in many insects. Most adult insects grow very little after eclosion from the pupa. Males wait on average three days after eclosion to begin mating. The pupal stage lasts about a week and mating takes place soon after adult eclosion. Males usually start eclosion (emergence) earlier than females and peak in numbers before females. Thus they are not capable of flight immediately after eclosion.