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Is my hamster pregnant? She's gaining weight, nesting, and sleeping.

Updated On September 23rd, 2025

Pet's info: Small Animal | Unknown - Small Animal | Female | unspayed

My female hamster is gaining weight sleeping a lot and building nests is she pregnant

1 Answer

Most Helpful Answer

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Answered By Andrea M. Brodie, DVM

Veterinarian

Published on August 21st, 2018

If your hamster had contact with a male hamster within the past 2-3 weeks then it is likely she is pregnant. Hamsters sleep a lot during the day and they do likel to have a nice cosy nest to sleep in, so that would be very normal behavior.

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