Guinea pig pregnancy has three main stages:
Embryonic development (0-14 days): During this stage, the embryos are implanted into the uterus lining and begin to develop.
Fetal growth (15-50 days): The fetus grows rapidly, and the mother's abdomen enlarges.
Preparing for birth (51-65 days): The mother's body prepares for delivery, and nesting behaviors may be observed.
The total pregnancy duration for guinea pigs can range from 59 to 72 days, with an average of 63-68 days.