Severe nausea and fatigue in the first trimester of pregnancy can cause weight loss and metabolic derangements.

“i mean the first trimester if you've obviously never been pregnant paul i mean it's like survival it's like uh it's it's hard it's really hard um just the nausea the fatigue i mean you got this tiny little you know embryo and it's like sucking the life out of you but i mean you want to make sure they're not losing weight so we watch their weight you know you want to make sure they're not getting metabolic arrangements like lots of electrolytes and things like that if they're you know actually vomiting”