“Every womb.” The school of Rabbi Yannai said: This teaches that even a hen of Avimelech’s household did not lay its egg.
On the daf / in context: The phrase is extended hyperbolically to show that the decree of closure affected every form of birth in the household, down to the animals.
Type of Learning
Derash on the verse (Bavli sugya) — not a formal named middah of the 13. The universal language is pressed to its extreme to illustrate the completeness of the decree.
What Is Learned
The closing was total: even the hens of Avimelech’s house ceased to lay eggs until Sarah was restored.