Infants wake when hungry, so duration of sleep begins as a function of stomach capacity. Within a month your daughter should be sleeping six hours a night at least.
Meanwhile, if your wife is expressing milk, you should share the small hours duty: spell her for a couple of nights to let her make a dent in her sleep deficit. (I confess that I did not, but I was not asked to.) And sometimes, the infant just needs to be walked around for 10 or 15 minutes--you can do that part.
Meanwhile, if your wife is expressing milk, you should share the small hours duty: spell her for a couple of nights to let her make a dent in her sleep deficit. (I confess that I did not, but I was not asked to.) And sometimes, the infant just needs to be walked around for 10 or 15 minutes--you can do that part.