-
Fertilization
-
Occurs when the sperm meets the egg
-
Pro-nuclei join together
-
Occurs when the nuclear membrane of the ovum disappears and 23 male chromosomes meet 23 female chromosomes, both nuclei double to 46 chromosomes and then fuse.
-
1st round of mitosis
-
2nd round of mitosis
-
3rd round of mitosis
-
-
Occurs when the third cleavage occurs and forms a morula
-
64 cell embryo called a blastocyst
-
Implantation
-
-
Ectopic pregnancy could occur
-
Disc with streak on the underside forms mesoderm
-
HCG beginsto be secreted
-
First missed period
-
Neural tubes forms
-
Heart begins to beat, arm, and leg buds appear. Yolk sac makes RBCs
-
Face plates forming
-
Cleft lip or palate may occur
-
Muscles form, bent neck, webbed hands & feet, and segmented back
-
Amniocentesis could be performed
-
Genitalia begins to differentiate, eyelids fuse, and amnion surrounds fetus
-
Occurs when all organs are formed
-
Chorionic villi sampling could be performed
-
Eyes open, fat added under skin, and head out of proportion to the body
