The Embryo And The Fetus

Question 1

At what gestation is an embryo?

Answer 1

From implantation until 8 weeks gestation

Question 2

What happens on day 15?

Answer 2

Blood vessels begin to form

Question 3

When does the nervous system, heart, eyes, ears, blood cells form?

Answer 3

Days 18-21

Question 4

What happens in weeks 3 and 4 gestation?

Answer 4

• The heart pumps blood
• The brain divides
• The lungs begin to form

Question 5

What happens at week 5 gestation?

Answer 5

The limb buds and the umbilical cord form

Question 6

What happens at week 6 gestation?

Answer 6

• The liver begins to function
• The kidneys form
• The genitalia form

Question 7

What happens at week 7 gestation?

Answer 7

• The palate forms
• The arms and legs begin to move

Question 8

What happens at week 8 gestation?

Answer 8

• The hands and feet are well formed
• The heart has four chambers
• Major blood vessels form
• Circulation begins through the umbilical cord
• External genitalia can be distinguished as male or female

Question 9

At what gestation does the embryo change to a foetus?

Answer 9

Week 8

Question 10

What happens in weeks 8-12?

Answer 10

• The fetus begins to swallow amniotic fluid
• Can pass urine

Question 11

What happens in weeks 13-16?

Answer 11

Meconium forms in the gut

Question 12

What happens in weeks 17-24?

Answer 12

• Foetal heart can be heard
• Mother may start to feel foetal movements

Question 13

What happens in weeks 25-28?

Answer 13

• Subcutaneous fat is laid down
• Eyes open

Question 14

What happens at week 29?

Answer 14

The foetus is fully formed