Hii, ask her to have small and frequent meals. Also having ajwain water and lemonade helps. She has have supplements like mothers Horlicks to fulfill the nutritional gap.

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please read these articles..it will helps ... 
it happens in starting months, she will be able to eat very soon..dont worry.. take more liquids &amp; much water..small meals can helps.. she can start protinex too ..

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Hello ladies 
My cousin is pregnant but due to excessive vomiting she doesn't like to eat much. Can u suggest some healthy options to keep her and baby energetic during the pregnancy phase.