Along with morning sickness, exhaustion, hormone roller coasters, and a million other natural indignities, pregnancy these days comes with a list of thou shalt nots longer than Leviticus.

Thou shalt not eat turkey sandwiches, thou shalt not have a glass of wine, thou shalt not touch soil where a cat may have walked, and some even say thou shalt not drink coffee. Thou shalt not exercise too much or sit too much. Outdoor air may harm your child, and so may inadequate sunshine. And whatever you do, don’t get stressed out.