When a client being seen in a fertility clinic doesn’t respond to the clomiphene citrate, the physician prescribes IM menotropins (Pergonal). This drug increases her risk of producing multiple follicles that could mature to ovulation. To reduce the high risk of multifetal pregnancy and its possible adverse effects the nurse should monitor（）
A. ultrasound study results and serum estradiol levels.
B. ultrasound study results and serum progesterone levels.
C. results of tests to detect luteinizing hormone (LH) in urine.
D. serum levels of human chorionic gonadotropin (HCG).
