nulliparae

Nulliparae refers to a woman who has never given birth to a viable fetus. This term is derived from Latin, where "nulli" means none and "parere" means to give birth. It is a descriptor used in obstetrics and gynecology to categorize a woman's reproductive history. A woman who is nulliparous has never experienced pregnancy that resulted in a birth at or beyond the stage of fetal viability, typically considered around 20 weeks of gestation or a weight of 500 grams, depending on the specific definition used.

The state of being nulliparous is distinct from being nulligravida, which describes a woman who has never been pregnant. Therefore, a nulligravid woman is always nulliparous, but a nulliparous woman may have been pregnant (gravid) but did not carry the pregnancy to term or birth of a viable infant. For example, a woman who has had an abortion or a miscarriage before fetal viability would be considered nulliparous if she has not subsequently given birth to a viable infant. Medical professionals use the term nulliparae to help assess risk factors and manage pregnancies, as a woman's parity can influence certain obstetric outcomes.