Background and aim: Attention to health of mother during pregnancy is essential for the health of both mother and infant. Early detection of high-risk pregnancies is fundamental for prenatal care. This survey was performed to find the prevalence of the high-risk pregnancies and causing factors in the maternity hospital of Bam in 2001. Method: This descriptive and cross sectional study was performed on 850 randomly selected pregnant women. Results: We found that 11.8% of the cases were younger than 18 years, 6.6% were older than 35 years, 8.8% had five or more pregnancies, 5.4% had pre-term, 6.3% had post-term labor, 2% had hemorrhaged pregnancy and 4.2% indicated signs of preeclampsia. The prevalence of various diseases were as follows: 12.3% afflicted with urinary infection, 0.8% had addiction. 0.4% had sexual transmitted disease, 0.4% had anemia, 0.6% had thyroid disease, 0.6% had cardiac diseases, 0.1% had liver disease, 9.1% had diabetes mellitus and 4.3% afflicted with more than one disease. Also 22.9% had low birth weight. Conclusion: Inappropriate age, urinary tract infection, hemorrhage and hypertension were the most important health problems of the pregnant women. For prevention of the high-risk pregnancies, education and prenatal care are necessary
