The study includes 100 ANC patients between 28 to 40 weeks of gestational period, who have attended the ANC OPD and IPD in .Sri Aurobindo Medical College & Post Graduated Institute Indore (M.P.) Data collected prospectively from November 2017 to May 2019. The objective of this study was to evaluate the status of vitamin B-12 deficiency in pregnancy and its impact on the maternal and foetal outcome. Our review, after summarizing existing data of this study, shows a causal relation between low Vitamin B12 level and adverse maternal & neonatal outcome birth. In pregnant women deficiency may cause or be associated with, IUGR, preeclampsia, preterm labour, low birth weight increased rate of LSCSr & Low levels of serum B12 have been documented among pregnant women in India who habitually are vegetarian or mix non vegetarians, taking small proportion of non-vegetarian food.