An ultrasound of a fetus' heart shows that normal fetal ...

[dejastew]

An ultrasound of a fetus' heart shows that normal fetal circulation is occurring. Which of the following statements is consistent with the finding?
 
  a. A right to left shunt is seen between the atria.
  b. Blood is returning to the placenta via the umbilical vein.
  c. Blood is returning to the right atrium from the pulmonary system.
  d. A right to left shunt is seen between the umbilical arteries.

Question 2

A clinic nurse explains to the pregnant woman that the amount of amniotic fluid present at 24 weeks' gestation is approximately:
 
  a. 500 mL
  b. 750 mL
  c. 800 mL
  d. 1000 mL

[joewallace]

Answer to Question 1

ANS: a
Feedback
a. This is correct. The foramen ovale is a duct between the atria. In fetal circulation, there is a right to left shunt through the duct.
b. Blood returns to the placenta via the umbilical arteries.
c. Most of the blood bypasses the pulmonary system. The blood that does enter the pulmonary system returns to the left atrium.
d. There is no duct between the umbilical arteries.

Answer to Question 2

ANS: c
Amniotic fluid first appears at about 3 weeks. There are approximately 30 mL of amniotic fluid present at 10 weeks' gestation, and this amount increases to approximately 800 mL at 24 weeks' gestation. After that time, the total fluid volume remains fairly stable until it begins to decrease slightly as the pregnancy reaches term.

[dejastew]

Excellent

[parshano]

TYSM