The B12 Shot: What Every Human Needs to Know About Injectable Vitamin B12 The effects of vitamin B12 supplementation in pregnancy and postpartum on growth and neurodevelopment in early childhood: Study Protocol for a Randomized Placebo Controlled Trial BMJ Open Vitamin B12 and Pregnancy: Benefits, Intake & Food Sources B12 Shots at Home: How, Where & How Often to Inject Yourself AZ IV Medics Vitamin B12 is essential for brain development, especially in early pregnancy when baby's nervous system starts forming. . Recently, a study evaluated how maternal vitamin B12 status affects children's cognitive function at