Week 1

Question 1

Day 1

Answer 1

▪️capacitation
▪️penetration
▪️2nd meiotic division
▪️fusing of pronuclei

Question 2

Day 2

Answer 2

▪️1st cleavage of zygote- splitting without growth

Question 3

Day 3

Answer 3

▪️16-cell morula formed

▪️after 3rd day cleavage compaction occurs-cells decrease in size

Question 4

Day 4

Answer 4

▪️morula enters uterine cavity
▪️blastocyst is formed
-trophoblast, inner cell mass, blastocyst cavity

Question 5

Day 5

Answer 5

▪️hatching

• embryo frees itself from Z.P
• extension and contraction cycles

Question 6

Day 6

Answer 6

▪️beginning of implantation

• embryo attached to endometrial epithelium
• trophoblast differentiates to syncytiotrophoblast and cytotrophoblast
• SCT produce proteolytic enzymes that erode maternal tissue and allow it to burrow into wall

Question 7

Day 7

Answer 7

▪️embryo is superficially implanted

-deriving nourishment from broken down maternal tissues