Health & Fitness Jul. 10 , By Cat Douglas Can you be pregnant on a vegan or vegetarian diet? Yes! You totally can. Many vegetarians and vegans will understand the frustration when telling the good news to family and friends that they are asked ’’Are you going to start eating meat now?’’. While well-meaning I’m sure, it’s only due to a limited understanding about being vegetarian/vegan that people have misplaced concerns.