What is another term for a calf in gestation?

There isn't really a specific term for a calf in gestation. Here are some options, depending on the context:

Formal/Scientific:

* Fetus: This is the most accurate term for an unborn animal in the later stages of development.

* Embryo: This term is used for an unborn animal in the earlier stages of development.

Informal:

* Unborn calf: This is a simple and straightforward way to describe a calf in gestation.

* Calf in the womb: This is another straightforward option.

Other:

* Calf in the making: This is a more poetic and informal way to refer to a calf in gestation.

The best term to use will depend on the specific context and the desired level of formality.