Fertilization and Implantation

When does cleavage occur?

30 days after fertilization

What does cleavage produce?

blastomeres

How often does cleavage divide?

every 10-12 hours

What is a morula?

A fertilized ovum that has gone through several divisions

what cells form a hollow cavity and produce a blastocyst?

blastomeres

What occurs in implantation?

the blastocyst touches the endomertrium, where there is rapid cell division. The amniotic cavity is formed and a third layer of cells (gastrulation) and the ectoderm, endoderm, and mesoderm form.

What are the steps of fertilization?