I just noticed your reply and wanted to encourage you to test for
ketones and to avoid getting high levels of
ketones. From the little bit of reading I've done, ketones can harm your baby severely.
Are you diabetic? Gestational diabetes? Type 1? Type 2? If so, it's important that you work with a high risk pregnancy team. It's not "right" that the medical team of a diabetic pregnant woman couldn't answer the question "what are ketones?