See Dr. Jack Newmans articles Using a Lactation Aid and Finger feeding How can I tell that my baby is getting enough milk?
By observing your baby (and not with absolute measurements), you can know without a doubt that your baby is getting enough milk: -baby suckles well and swallows in a rhythmic fashion (no pain for mother) -as of day 4, baby stools at least 2-3 times per 24 hours (liquid, yellowish stools) -baby’s urine is clear and with no strong odour -baby has regained birth weight by 2 weeks (3 weeks maximum) and is gaining an average of about 15-30 gr (½-1 on.) per day until the age of 4 months.