@article{Opara2007,
author = {Opara, E.I. and Zaidi, J.},
title= {The interpretation and clinical application of the word ‘parity’: a survey},
year = {2007},
doi = {10.1111/j.1471-0528.2007.01435.x},
journal = {BJOG: An International Journal of Obstetrics & Gynaecology},
volume = {114},
number = {10},
pages = {1295--1297},
}