Translation:Is the rabbit a male or a female?
Can mannetje and vrouwtje be used as little men and little women, or do they only translate to male and female?
Both, but if it's used with animals, it's always "male" and "female". :)
If we're referring to the sex of humans, do we also say "mannetje" and "vrouwtje" (for example, on forms, reports and so on.)