At What Age Can a Guinea Pig Give Birth, and How Many Per Litter

1 Guinea Pig Breeding and Birth

1. Age to give birth

About 3 months (around 500 g); weigh the pig if its age is unclear.

A first birth after 7 months raises dystocia risk from pelvic fusion; breed the first litter before 7 months.

2. Signs of estrus

Head lowered and forward, a low rapid throat rumble, body stretched, rump twisted slowly forward. Also lower appetite, scattered urine, and irritability; long estrus drops weight, dulls the coat, and lowers immunity.

3. How many per litter

1-7, by the parents’ health, nutrition, and setting. Pups walk at birth, eat within 2 hours, and take soft food in 1-2 days.

They estrus year-round, so they breed year-round; gestation is about 68 days, up to 5-6 litters a year. The female can conceive again half a day after birth, so the cycle is short.

4. Birth cautions

Warmth: keep at least 22 C so pups are not chilled; the mother is also weak when cold. Put the nest in a warm sheltered corner wrapped in old clothes; use a heat lamp if cold.

Separate male and female after birth to avoid quick re-pregnancy or pregnancy toxemia, letting the mother rest.

No baths; keep the cage dry, clean, and warm; stay quiet and do not move items, or the mother may be scared off nursing.