With a first baby, it can seem so hard to tell if your baby has finished feeding or not. I have been asked about this a lot. Certainly the amount of time isn't a reliable indicator, as some feeds will take a shorter or longer time than others - it is normal for the length of a feed to vary through a 24-hour period. Usually, your baby's hands will give you cues about whether she needs to continue the feed or is finished. While there can be exceptions, I have actually found these very rare.