What does "parity" refer to in obstetrics?

Parity in obstetrics specifically refers to the number of pregnancies a woman has carried to 20 weeks and 0 days or beyond, regardless of whether those pregnancies resulted in a live birth, stillbirth, or miscarriage. The focus is on the gestational age rather than the outcome of the pregnancy.

This definition is significant for understanding a woman's reproductive history and can impact her care during pregnancy. It provides important information about her obstetric risk factors, as pregnancies reaching 20 weeks mark the point of viability for a fetus.

The other definitions, while related to obstetrics, are not accurate reflections of the term "parity." Understanding this distinction is crucial for healthcare providers when assessing a woman's pregnancy history and planning her care during her reproductive years.