Question

explain in detail the main stages of fertilisation in human beings

Answer 1

the four stages of fertilization in human is sperms and ovum meets together and fuse and fertilization take place thus zygote a form after this second is cleavage of egg and and in human beings equal holoblastic cleavage in this zygote divides and form 2equal cell after this blastula in blastocyst imlanation pellusida a protective layers is form after ...an infant baby