they said mine at 30 weeks were 1402grams and 1800grams and they were born 2 days later at those exact weights- the u/s woman was absoultely spot on. How freaky was that- but then again, she had to be as it was the reason that i had to had them early as twin 1 had IUGR and minimal chord flow. Mind you she was a highly trained ultrasound specialists.

good luck
odette