Thank you for your query,
In spite of 38.6 weeks of term gestation your child birthweight
was low, so it is suggestive of Intrauterine Growth Retardation(IUGR).
IUGR babies will have higher level of hemoglobin
and it causes increased viscocity of the blood.
The cause of high hemoglobin is due to persistent stimulation of erythropoitec system by chronic hypoximic condition that led to IUGR.
IUGR babies prone for low blood glucose
levels because of polycythemia and relatively bigger brain size
in comparision to the liver.
Frequent feeding is important to maintain normal glucose levels in blood and monitoring for any learning and cognitive deviations are important for early intervention.
Hope i have answered your query.