I encourage all expecting and nursing moms to watch this video from Stanford Medicine about Hand Milk Expression and how effective it is at increasing milk output and overall supply. Studies have found that mothers who use hand expression in addition to and during breastfeeding and pumping are able to get about 50% more milk output!
Hand expression is correlated with longer duration of breastfeeding, and better milk supply than when mothers use a breastpump alone for milk expression.
Additionally, hand expression is:
Can be very efficient for most mothers
Can be less uncomfortable or annoying than a breastpump.