My wife was also given vitamin b12 shots for b12 deficiency (169pg/ml) during her 7th week of pregnancy. any comments on the course of treatment.

Treat aggressively: Low B12 in early pregnancy significantly increases risk of neural tube defects, a serious birth defect. If this was my patient i'd give injections of methylcobalamin (not cyanocobalamin) 1000 mcg every day until levels come up ; test to make sure your baby was not already affected. See http://www.Webmd.Com/baby/news/20090302/birth-defects-linked-to-low-vitamin-b12 ; http://bit.Ly/jxwxd2.