There isn't a specific time when pregnancy food cravings start. It's different for every woman and you may not necessarily have any cravings. If you do start having cravings, it'll probably be in your first trimester (it could be as early as 5 weeks into pregnancy).
How early in pregnancy do you get appetite?
“I've found that this varies greatly from woman to woman, but on average I would say the majority of my clients begin to notice a marked increase in their hunger around the halfway mark or 20 weeks,” says dietitian and lactation consultant Meghan McMillan, MS, RDN, CSP, IBCLC, of Mama and Sweet Pea Nutrition.