Does your infant have a regular fussy period each day when it seems you can do nothing to comfort her? This is quite common, particularly between 6:00 p.m. and midnight—just when you, too, are feeling tired from the day’s trials and tribulations. These periods of crankiness may feel like torture, especially if you have other demanding children or work to do, but fortunately they don’t last long. The length of this fussing usually peaks at about three hours a day by six weeks and then declines to one or two hours a day by three to four months. As long as the baby calms within a few hours and is relatively peaceful the rest of the day, there’s no reason for alarm….more