Pregnancy Hypertenssion and Preeclampsia in Enviromental Expossure to Carbon Monoxide

Introduction: In this study relationship between carbon monoxide (CO) with pregnancy induced hypertension and preeclampsia in mothers in various levels of CO pollution was evaluated. Methods: The study was carried out in three teaching hospitals and 4500 pregnant women living area divided in one low-level CO polluted and as the second level, three moderate to high polluted areas (central, south and west). The subjects, residence places were within 5 kilometers of the air pollution monitoring stations and didn,t change throughout the research. Hypertension and preeclampsia were diagnosed with a gynecologist. In standard position, blood pressure was measured after 6 hours of delivery. Results: In the high CO exposed mothers than the low-levels exposure ones systolic blood pressure was significantly lower and diastolic blood pressure was significant higher. There is no significant difference in pregnancy induced hypertension and preeclampsia among various areas. Conclusion: The different effects of CO on systolic and diastolic blood pressure could be occurred due to CO various biological actions in the body. Further investigations about measurement of CO is required to determine our findings about low to moderate levels of CO effect on pregnancy blood pressure.