What is the proper term for when an animal is "pregnant" with eggs instead of live young?
Specifically things like chicken or most fish.
Solution 1:
gravid
/ˈɡravɪd/
adjective
adjective: gravid
-
1.
technical carrying eggs or young; pregnant. "the retroverted gravid uterus"
Oxford Dictionaries
Solution 2:
in lay (entry 'lay' section phrases
(of a hen) laying eggs regularly.
http://www.oxforddictionaries.com/definition/english/lay
Definition of gravid in English: adjective 1 technical Carrying eggs or young; pregnant: the retroverted gravid uterus
http://www.oxforddictionaries.com/definition/english/gravid