Which of the following secretes fertilizin?

The test-tube baby programme employs which one of the following techniques?

Fertilization in humans,rabbits,and other placental mammals occurs in:

Identify the structure shown in the image (assuming a blastocyst stage with inner cell mass and trophoblast).

In the blastocyst,the blastomeres are arranged into an outer layer called _ $A$ _ and an inner group of cells attached to the trophoblast,called _ $B$ _.

Fertilizin is a chemical substance produced from