What does g3p1 mean?

"g3p1" is likely an abbreviation for "Gestation 3, Parity 1," which is a way to describe a pregnant individual's obstetric history. "Gestation" refers to the number of pregnancies, and "Parity" refers to the number of times the individual has given birth to a viable offspring. Therefore, in this case, it would indicate that the individual is in their third pregnancy and has had one previous successful childbirth.