Huge head for baby

Patient: Dear Doctor,My wife has 34 week and 4 days pregnancy. in the last day the doctor conducted scanning and as doctor told the baby’s head has 39 week growth and other parts of the body is as normal. She has anemia and her hemoglobin was 7 to 8.5 gm upto 32 weeks. Now it is 9.5. So i am worried that is it any defects? Is there any problem with this during delivery or after? please help me.