as babies no. sub adults can sometimes have signs but hard to tell. An easy way to differentiate between male and female is that the male will call around 6 months of age or later. Females are larger, bulker, longer. You can usually tell around 6 months of age because the females will have a larger build. Something I have noticed with keeping this species. I have 4.3 and were able to tell the sex @ six months by those characteristics.