Take in plenty of fluids if you cannot eat anything. The nausea doesn't affect the baby also the baby doesn't absorb any nutrients from the food you consume for the 1st 3-4 mths. Baby will still grow cos your body will provide the necessary even if you're not eating or drinking anything, just make sure you're not dehydrated. During my 1st trimester, I vomited so much and lost 6kgs. Could only drink soup and juice throughout but the baby was fine and growing well. The vomiting stopped when I was 18 weeks and I could eat abit. I'm currently 39 weeks but my appetite is still very bad, I can only eat very little selection of food which is mostly bread, fish, noodles. Thankfully, the baby is weighing 3kg and is healthy *touchwood*. So don't worry too much, all will be well.
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