Conventional IVF procedures include （）

A.Gonadotropin is used to stimulate the development of multiple follicles.

B.The development of follicles are monitored by blood endocrine hormones tests and B-ultrasound.

C.When follicles grow to mature, chorionic gonadotropins are injected to trigger for final maturation.

D.After 36 hours, B-ultrasound-guided puncture will be performed to mature follicles.

正确答案：Gonadotropin is used to stimulate the development of multiple follicles.；The development of follicles are monitored by blood endocrine hormones tests and B-ultrasound.；When follicles grow to mature, chorionic gonadotropins are injected to trigger for final maturation.；After 36 hours, B-ultrasound-guided puncture will be performed to mature follicles.