Reproduction standalone

Question 1

What does the embryo do on day 4?

Answer 1

Cells flatten
Maximise intracellular contacts
Tight junctions form
Polarisation of outer cells
Morula this is

Question 2

When do cavitation and differentiation ocuur?

Answer 2

Day 5 - tight junctions occur between outer cells - forms the trophectoderm
Fluid filled cavity expands
Sodium pumped in - water moves in by osmosis
>80 cells, 50-66% trophectoderm, rest inner cell mass(pluripotent)