Loads of water, making sure you get your 5 a day from a variety of things (i.e. not just 5 apples!) Avoiding refined sugar like sweets and sugary drinks. Theres some controversy about sweeteners too so you might wanna research that before just buying 'diet' fizzy drinks, although they wont pile on the pounds. Make sure youre eating enough carbs but you can do things like switch from white bread to granary which releases sugars more slowly and the same with white rice to brown rice. Have enough dairy too cos baby is building bones. Grill your meat instead of frying. Its all little things you can do really to be generally healthy.
Also walk for half an hour a day at a fast pace ( but dont get overheated) Im gonna look into pregnancy yoga. My mum reckons squats are good to do becasue if you can maintain a squating position for giving birth its a really good position as long as your muscles are built up for it!
You will gain weight but it doesnt need to be fat! My OH and I are trying really hard to adopt a healthy eating lifestyle cos we want our little one to have healthy attitude to food. We dont buy crisps or biscuits anymore, we've been having a full fruit bowl and buying things like crackers and breadsticks instead of crisps.
Good luck!
