Common to pregnancy is nausea, and that may mean the mother misses a meal or two. Missing a couple of meals, or even not eating for a day, isn't an immediate concern because your body has nutrient stores that it can pull from to give both mother and baby what you need. HOWEVER, it's important to pay close attention to how you feel, because without food to give you energy, you can easily become faint, light-headed, lack energy for basic tasks, etc. If you can't eat, try nutritious drinks like protein shakes. This is also an important time to stay hydrated, but if you can't keep any food or drink down, see your doctor immediately.