Embryology

fertilisation takes place in the ampulla

fimbria sweep the oocyte into uterine tube

sperm undergoes capacitation

sperm penetration initiates cortical reaction

blastomeres divide to form zygote

morula

blastocyst - cyst filled with blastomeres

trophoblasts (form placenta)

takes off zona pellucida

fusion of pronuclei

embryoblast (form embryo)

outer

inner

syncitiotrophoblast

cytotrophoblast

hypoblast

epiblast

maternal blood sinusoids

lacunae

extraembyonic mesoderm

chorionic cavity