Yes, that feeling that you’ve been hearing about and dreading may have started by now. The term “morning sickness” is misleading, as this queasiness can occur in the morning, afternoon, evening, or middle of the night. Instead of calling it morning sickness, in our practices we refer to it as pregnancy-induced nausea (PIN). The intensity and duration of PIN is as individual as a mother’s weight gain. For most women, it seems to peak at four to seven weeks.