In sexually reproducing animals the union of male and female gamete forms a cell which is called
Ovarian cell
Oocyte
Zygote
Graafian follicle
Sex of baby has been decided at which stage ?
Implantation is the process of
Write a note on pregnancy and embryonic development in human beings.
The layer of cells immediately surrounding the ovum but outside the zona pellucida is called
Blastocyst is a modified blastula of