Think about this logically. Consider a person. This person is pregnant. From this fact alone we can infer the presence of a female reproductive system. Which means that this person must be a woman.
Or, we can look at this from the other direction. Male sexual development does not result in a female reproductive system. Therefore this person is not a man.
You can perform this exercise of logic with any species that has individuals with different reproductive roles. For example: consider a chicken. This chicken lays eggs. From this we know that this chicken has a female reproductive system. Therefore this chicken must be a hen, not a cock.
Or, we can look at this from the other direction. Male sexual development does not result in a female reproductive system. Therefore this person is not a man.
You can perform this exercise of logic with any species that has individuals with different reproductive roles. For example: consider a chicken. This chicken lays eggs. From this we know that this chicken has a female reproductive system. Therefore this chicken must be a hen, not a cock.