Amniotic Fluid

Question 1

By day 9 when the ectoderm is fully implanted, the ectoderm is gradually displaced with what?

Answer 1

Extracellular fluid (amniotic fluid)

Question 2

As embryo grows what happens to the amniotic membrane?

Answer 2

It grows until it covers the entire embryo except the umbilical area.

Question 3

What happens at 4-8 weeks with the amnion?

Answer 3

Due to amniotic fluid production increase, the amnion swells so that the amnion and chorion now grow in close proximity

Question 4

When does amniotic fluid level start to decline?

Answer 4

39 weeks

Question 5

During the first half of pregnancy, amniotic fluid is similar to the composition of maternal plasma. What changes this?

Answer 5

After 20 weeks the fetal kidneys and lungs contribute to amniotic fluid composition

Question 6

What differentiates the composition of amniotic fluid to maternal or fetal plasma?

Answer 6

It is hypo-osmolar (less fluid intake)