The existence of modifiable risk factors of cardiovascular diseases of mothers before pregnancy is associated with the risk of preterm childbirth and low birth weight. This study aimed at determining the risk factors of cardiovascular diseases in pregnant women referred to Golestan Hospital in Ahvaz. This is a descriptive-analytical study performed in a cross-sectional way in 2020. The study population consisted of 200 pregnant women referred to Golestan Hospital in Ahvaz. Because of the restricted size of the statistical population, no sampling was done. For purpose of data collection, a two-part questionnaire (questionnaire and laboratory findings) was used. Data analysis was done using linear regression, t-test, and one-way analysis of variance (ANOVA) at sig level of 0.05 by SPSS22 software. The majority of pregnant women (45%) were in the age range of 30-40 years old. The highest portion of risk factors of cardiovascular diseases was respectively associated with smoking in the family (77.5%), smoking by the person (60%), history of hyperlipidemia (47.5%), and stress (42.5%). The lowest portion causing the disease was associated with inadequate nutritional behavior (30%), diabetes (35%), hypertension (37.5%), and history of cardiovascular disease in first-degree relatives (40%). According to obtained results and high prevalence of risk factors of cardiovascular diseases, especially smoking and hyperlipidemia in pregnant women, it is essential to make careful plans for continuous training to change the lifestyle such as good nutrition, exercising, and regular physical activity as effective solutions to decrease the prevalence of cardiovascular diseases.