I wondered at the insectoid babies... they looked like fully formed insects from the get-go. That's not how RL insects on earth work. They come out as caterpillars, maggots, general wormy-things, and then eventually metamorphose into insects with legs (and in some cases wings).
I guess the insectoids wouldn't be exactly
like earth insects though, being an alien species and all that. Their respiration system would have to be different for example - real life insects are size-limited by their inefficient system for oxygenating their bodies. The largest insect in the world is the Giant Weta of New Zealand, it's about 2 - 3 times the size of a mouse.
Insectoids that were human sized pretty much would need to have something like lungs somewhere, and a more developed circulatory system, to distribute the oxygen carrier as needed.