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Can my young female guinea pig be pregnant after a month with male?

Updated On September 23rd, 2025

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

Hi , my name is vibin and im a student , i am a new guinea pig owner i had one male guinea pig first and i got Another as a present for my bday , so Now i have a male and a female guinea pig and i put em in one cage together . I didnt know it was a bad idea before i did some research on it . They have been together for almost 1 month now ; The thing is that i cant seperate them or desex the male coz i cant afford for that and now im afraid if my new piggy is too small to be pregnant

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1 Answer

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Answered By Dr. Melanie, BVSc MS

Veterinarian

Published on February 25th, 2018

If they have been together for a month, it certainly is possible that Candy is pregnant. The good news is that it's better for guinea pigs to get pregnant when they are young like five or six months of age; in fact, if you plan to mate guinea pigs, it should be done before the female is eight months of age. This is because that is the time when their pubic symphysis is open to allow normal delivery of the guinea pig pups. After eight months of age, it fuses and they should not be mated at that time. Candy and the male will have to be separated when she gives birth to the pups, as the male should not be in the cage with them all. You will also have to separate any male guinea pig pups from the mother by three weeks of age because this is when they reach sexual maturity. They will mate with their mother. In addition, the father guinea pig should not be around the female guinea pig pups because they reach sexual maturity at four weeks of age, and he will mate with them. I would start saving money to get a new cage for the male so you can move him as soon as possible, and save money to get him neutered. If Candy is pregnant, you will need to have cages for the pups as well once they are old enough to be separated from their mother so they don't mate with their parents or each other. I would take Candy into the vet to confirm if she is pregnant or not. Good luck, I hope this helps!

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