Which of the following is not true for hCG in a pregnant female?

Options

A. it is a proteinaceous gonadotrophin but not released from adenohypophysis
B. maximum levels of hCG are observed during first trimester
C. Prega news' a home pregnency kit developed by Mankind pharmaceuticals relies on detection of hCG in urine
D. High levels of hCG directly exert negative feedback on hypothalamus leading to amenorrhea during pregnancy