Pollen is collected from the bagged male plant and deposited into the ovary of the bagged emasculated female plant. Two sperms are formed from the pollen. Sperm enter two follicles. In the embryo, one of the two sperm fuses with the egg and the other fuses with the secondary nucleus. The union of sperm and ovum is called fertilization and the union of sperm and secondary nucleus is called triploidy. Nishek and Trimilan together are called Bi-Nishek.