Parity Progression Ratios refer to the statistical analysis of the proportion of successfully completed pregnancies over the total number of pregnancies. Synonyms for this expression include the term 'parity ratio,' 'success ratio,' 'pregnancy outcome ratio,' or 'delivery rate.' All these expressions aim to assess a woman's reproductive abilities and the likelihood of successful pregnancies. The purpose of studying such ratios is to provide important insights into women's health and fertility, as well as to develop effective public policies to improve maternal and neonatal health. Understanding these synonyms would help researchers and healthcare professionals to better communicate their findings and share knowledge on reproductive and maternal health.