The ultrasound may be off my daughter could have been due by the size the dr said her head was on march 8th and they said on march 28th she was 9 1/2 and she was born on April 1 2009 at 7 lbs 15oz and a normal sized head for a baby born at full term she didn't have a huge head like the doctors made me fear! So you can give them around a 2weeks at the most

