I put on no weight until U was over 20 weeks pregnant with the twins...and trust me I had a massive bump so it was all coming off elsewhere! I asked my ob about it and he basically said babies will taje what they need from you, and not to worry they were developing fine.

BY the end of the pregnancy I had put on about 20kg so I didn't worry any more. As long as you are eating to hunger and drinking to thirst then you will be giving your body what it needs.