This study delineated variables such as low birth weight, very low birth weight, extremely low birth weight, intrauterine growth restriction, and three-phase periods of preterm labor. The key feature of this study was the use of analysis of variance and post-hoc and nonparametric analysis to elucidate the different levels of prenatal care and their effects on pregnancy outcome. In summary, the hospital-based prenatal care model provides multidisciplinary, co-operative, co-ordinated, comprehensive and well-established prenatal care. However, from our evaluation of traditional independent physician-based prenatal care service and hospital-based care, we cannot conclude which is the better care model. In terms of discontinuity of prenatal care, the physician-based group may be inferred to have greater disease severity and relatively poorer pregnancy outcomes such as low birth weight. These poor outcomes result from discontinuity of obstetric care [25] , the hierarchical system of medical service, emergency obstetric management strategies [26] , the patient's awareness of prenatal care and her decision making, and customer-oriented care-seeker behavior. However, these factors were not related to the quality of obstetric care in physician-based practices.