Hi Lauren22,

At 8 weeks, probably very little. The recommended weight gain in the first trimester is only a kg or 2 (so that's up to week 13). Some women lose weight in the first trimester because they have such bad nausea and vomiting. The weight begins to really go on mid-second trimester and third trimester, and the total recommended gain is around 12-15kg if you were around your optimal weight when you began (if you were underweight, you might put on more. Overweight, you might put on less).

I'm now 24 weeks, and I only put on about 2kg up to 16 weeks. It's all coming on now then.

I think if your doc is concerned about size, it's not to do with how much you are eating or how much weight you have put on, but more about the whether your bubba is developing at the right pace.

I hope this is some help.

All the best to you and your little one.