My one month old baby girl is not latching properly hence my wife using electric breast pump for feeding her,,,we have tried a lot but she is not closing her mouth.is it ok???and how much time my wife should using this pump??

A. That can be up to eight to 12 times in a 24-hour day, or every two to three hours for 15-20 minutes at a time. As your milk supply becomes more established, you may find that you can space out the pumping for longer, at least at night.