Background: Caffeine is a stimulant found in tea, coffee, cola, chocolate and some over-the-counter medicines. Clearance of caffeine from the mother’s blood slows down during pregnancy. Some authors of observational studies have concluded that caffeine intake is harmful to the fetus, causing growth restriction, reduced birth weight, preterm birth or still birth. The newborn could also have withdrawal symptoms if the mother has a high intake of caffeine (more than eight cups of coffee per day). Drinking three cups of coffee a day in early pregnancy had no effect on birth weight, preterm births or growth restriction. Aim of the study: The aim of this study was to assess the effects of restricting caffeine by mothers on fetal, neonatal and pregnancy outcomes. Subjects and methods: Research Design: A quasi experimental design was used in conducting this study. Sample: A purposive sample composed of 200 pregnant women. The study sample was divided randomly into 2 groups (the control and study group). Tools: Two tools were used for data collection which named; interviewing questionnaire and fetal, neonatal and pregnancy outcomes tool. Main Results: the current study revealed a relation between caffeine intake and gestational anemia, occurrence of cesarean deliveries, abnormal placental weight, neonatal low birth weight, neonatal apnea and neonatal caffeine withdrawal syndrome. Conclusion: Research hypotheses 1 is rejected while 2 and 3 are accepted. Recommendations: Preconception counseling for women about correcting the unhealthy habits including caffeine consumption. Women with previous neonatal complications must consider eliminating caffeine.