HCG Is an Important Biochemical Marker for Pregnancy and Therefore

hCG is an important biochemical marker for pregnancy and therefore the basis for many tests.Which statement regarding hCG is true?

A) hCG can be detected as early aS₂½ weeks after conception.
B) hCG levels gradually and uniformly increase throughout pregnancy.
C) Significantly lower-than-normal increases in the levels of hCG may indicate a postdate pregnancy.
D) Higher-than-normal levels of hCG may indicate an ectopic pregnancy or Down syndrome.