Woodlice babies, when released from the brood pouch of the female, have six pairs of legs. At this stage, they are called "mancas." After the first molt, which occurs within 24 hours of release, the 7th leg bearing segment appears and after another molt they gain their full complement of seven pairs of legs and are juveniles. Juveniles molt at regular intervals until they reach sexual maturity, usually within a year, when they become adults. The molting process continues after maturity (although with less frequency) and involves shedding the exoskeleton in two parts.

Controlling Sow Bugs and Pillbugs
The presence of sow bugs or pill bugs in the living quarters of a home is an indication high moisture conditions. This condition will also contribute to a number of other problems including mildew, wood rot and a good breeding environment for other insects. Reduce moisture or humidity level indoors. Use bathroom fans, stove hood vent fans, vent clothes dryers outside. Crawl spaces and attics need to be well ventilated. Remove excess vegetation and debris around exterior perimeter of the home. Make sure that leaf debris (leaves hold moisture and hide the bugs) is cleaned up from around the outside of your house. Keep rain gutters and downspouts clean and in good repair.

Instead of chemicals, use a caulking gun to close any cracks or crevices at or near ground level. Houses built on a concrete slab poured directly on the ground, can have more of a problem with sow bugs or pill bugs if there is no moisture barrier under the concrete. Built-in planters are usually a bad idea for many reasons. Window box planters and planter boxes on decks tight against the house are good breeding places for many bugs. Make sure all your doors (ground level, to the outside) are weather-stripped. If your garage is attached or integral with the house, make sure those doors are properly weather-stripped also. Watch for obvious moisture problems in the garage and bottom level. Keep soil levels well below structural wood around the home.