How Do You Tell If a Guinea Pig Is Pregnant Or Just Fat Or Bloated?

A study on the reproductive system of guinea pigs shows they reach maturity at an early stage. If you recently got a piggy pet, it’s not too early to start worrying about pregnancies.

Perhaps your guinea pig looks bloated, and you are unsure whether it’s a pregnancy. No worries, there are a few signs to look out for when a guinea is pregnant.

In this article, we’ll discuss the vital signs of pregnant guinea and their gestation period.

When Are Guineas Sexually Mature?

Male guineas are sexually mature at three months of age, while their female counterparts mature at just two months of age. It shows that guineas mature at different stages.

In other words, you should start looking out for them early. In this way, you can easily spot their pregnancy and make early decisions on their well-being.

Also, if you wouldn’t want your guinea pigs to breed yet, you get to separate them on time. If possible, consider placing them in different cages until you are ready to let them breed.

Is My Guinea Pig Bloated Or Pregnant?

Signs of a Pregnant Guinea Pig

Undoubtedly, a bloated stomach is one of the signs of a pregnant guinea pig. If your guinea suddenly discovers a bloated stomach, then there is a high chance that it is pregnant.

However, you shouldn’t make decisions if you Don’t have facts. More importantly, always keep in touch with your veterinarian.

A Vet doctor is in the best position to advise you on what to do and even check if the pregnancy is positive.

6 Signs of a Pregnant Guinea Pig

Asides from a bloated stomach, several other signs indicate if your guinea is pregnant.

Notwithstanding, your guinea pig can have a bloated stomach without being pregnant. However, it is one of the vital signs.

These signs are listed below:

1. A Bloated Stomach

As mentioned earlier, this is one of the most common signs to look out for. Most pregnant soars develop bloated stomachs at an early stage. It shows they are eating enough food to sustain the growing baby in their womb.

Also, as the baby guinea grows, your guinea’s stomach is more likely to increase. If you are unsure whether your guinea has a bloated stomach, try checking out the other guineas.

If you compare her stomach to other guinea pigs’, the difference will be ear enough. A pregnant guineas’ stomach will always look curvier and more rounded than others.

2. Huge Appetite

Once a guinea gets pregnant, it will develop a massive appetite for food. If your guinea eats twice a day, then it’s likely to increase its food intake to 3 or 4 times a day.

Due to the growing baby in her womb, she is prompted to eat more food to nourish the baby. So, if your guinea is eating more than usual, then it might be pregnant.

3. Weight Gain

Weight gain comes with a large food intake, and this goes for your guinea pig. Once they increase their food intake, the next sign is an increase in size.

You will notice your guinea is getting fatter than usual and might continue growing in size as the pregnancy advances.

To monitor her weight gain:

  • Try placing her on a kitchen scale
  • Check if it contains a flat flop, and place a cloth over there. It ensures your guinea feels safe and relaxed.
  • Place your hand over your guinea to ensure it doesn’t fall off by mistake
  • Record her weight for that week
  • Repeat the same exercise for a few more weeks and check the difference

4. Change in Movement

A pregnant guinea is sure to change how she walks. Once you identify the bloated guinea, watch her closely for a few days.

To accommodate the growing baby in her, your Guinea pig will walk or run a little more awkwardly than usual.

5. Change in Behaviour

This is usually more evident if your Guinea is usually active. A pregnant guinea will likely avoid popcorning or jumping around with fellow guineas.

If Guinea is expecting a baby, she will withdraw and become less active or social. You might find her lying down far away from the other while they play.

Pregnancy makes them tired, and they try to focus more on nourishing the baby.

6. Feel the Stomach for a lump

It’s possible to detect pregnancy by feeling your guinea’s stomach for lumps. Now you can only try this if your Guinea is social enough to allow you to touch her.

  • Try placing your hand on the stomach
  • Examine their stomach and sides with your fingers
  • Ensure you don’t apply any pressure on their stomach as this stresses them more
  • If you feel lumps in their stomach, then your piggy pal may be expecting a baby
  • If your Guinea growls at you or runs away, avoid touching them again; contact your vet doctor instead.

What is the Best Way to Know a Pregnant Guinea Pig?

Some vital signs of pregnancy in Guinea pigs include; a bloated stomach, increased appetite, and weight gain, all these indicate your Guinea might be pregnant.

However, none of them are 100% correct. If you want to ascertain if your Guinea is pregnant, you should visit a veterinarian. They can advise you and even cross-check and give a definite answer on your Guinea pregnancy.

If you don’t have a vet doctor for your Guinea yet, you should contact one before your Guinea becomes pregnant.

How Long Is the Gestation Period of Guinea Pigs?

If your Guinea pig is pregnant, how long does the pregnancy last? How long is their gestation period?

Guinea pigs have a gestation period range of 59 to 72 days. As a Guinea owner, you might find it challenging to track how long your guinea’s pregnancy will last. However, it’s easier to estimate if you know their gestation period.


Most often, a bloated stomach in Guinea pigs indicates they are pregnant. If your Guinea pig is suddenly withdrawn, walks awkwardly, and develops a vast appetite, it’s likely to be pregnant.

Also, they tend to add weight and look more rounded. The best way to ascertain the pregnancy is to seek help from a veterinarian. In this way, you get to make better decisions for your Guinea pig at an early stage.

Similar Posts