Iranian primigravid women's awareness of the risks associated with delayed childbearing.

Objectives: To explore older (35 years +) primigravid women's knowledge of the risks of delayed childbearing and to identify the characteristics of those with limited knowledge.

Methods: A cross-sectional survey involving 675 primigravid women in Tehran, Iran, using a cluster random sampling method at the first prenatal visit. A validated questionnaire assessed the women's awareness of delayed-childbearing risks.