All are true regarding fetal skeletal mineralization except: (A) Approximately 30g of calcium is needed especially during 3rd trimester., (B) Calcium required by fetus is only 10 % of maternal, skeletal calcium., (C) Amount of calcium absorbed increases to 400mg / day in the third trimester., (D) PTH plasma concentration is decreased in first trimester, but increases progressively later.
Answer is B. Fetal calcium requirement is only 3 % of total calcium held within maternal skeleton.