Getting hungry in the middle of the night is the staple side effect of pregnancy. Growing a baby is hard work, and it requires ample energy, so it's no shock that you would be hungry around the clock. The best middle of the night snacks when you're pregnant will ease your hunger and provide you with nutrients you need.
When I was pregnant I could not eat much during the day, but for some reason, I could plow through some food late into the night. And I craved some truly bizarre foods, be it deviled eggs at 4 a.m., or salt and vinegar almonds at midnight. "Pregnancy cravings can be caused by a number of things, including hormones, a heightened sense of smell and taste, and nutritional deficiencies," Intermountain Healthcare noted on their blog. For instance, if your body is in need of vitamin C, you might go for an orange. Not only does it smell nice to even the most sensitive of noses, it's healthy and delicious. (Plus, it's dead easy to prepare.) Or perhaps you might be a tad dehydrated, so you crave shave ice or juicy pears.
Maybe, you're not deficient in anything other than a sensation of being full, so you make a bowl of popcorn and toss in peanut M&Ms and sprinkle the whole things with chili powder and salt, because you're pregnant, and it's delicious. (It also causes nasty heartburn, so maybe don't eat this one in the middle of the night.)