Atomic force microscopy ; human chorionic gonadotropin ; unbinding force .

原子力显微术;人类绒毛膜性腺激素;解离力。

Pregnancy hormones human chorionic gonadotropin ( hcg ) is a hormone present in the blood within about a week of conception .

人类的绒毛膜促性腺激素（hcg），大概在怀孕后一星期，会出现在血液里。

Abnormal placental secretion of chorionic gonadotrophin .

绒毛膜促性腺激素的异常胎盘分泌。

Human chorionic gonadotropin ( hcg ) radioimmunoassay kit .

人绒毛膜促性腺激素放免药盒。

Amniocentesis and chorionic villus sampling in twin gestations : which is the best sampling technique ?

双胞胎妊娠宜采用羊膜穿刺术还是绒毛膜绒毛取样：哪一项是最佳的取样技术？