L-arginine is a nutritionally an essential amino acid in pregnancy for the placental and embryonic growth. L-arginine helps in production of nitric oxide. L-arginine-nitric oxide biosynthetic pathway in pregnancy helps with placental vascular development, fetal growth and improving birth outcomes. During pregnancy, increase in the demand for L-arginine, exceeds synthesis of L-arginine from L-citrulline, necessitating increased dietary intake. Increaing L-Arginine in diet among pregnant women is simple intervention in resource-constrained countries to prevent adverse birth outcomes, including fetal growth restriction, preterm birth, and low birth weight (1✔✔Trusted Source A Potential Strategy to Improve Birth Outcomes in Low-Resource Settings