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Fetus

By AdminPosted On 05-Oct-2016

1. In which week of gestation red cells first appear in foetus?



a) About 2 weeks

b) About 4 weeks

c) About 6 weeks

d) About 8 weeks

Correct Answer: c) About 6 weeks. Red cells first appear at about 6 gestational weeks. Fetal hematopoiesis first takes place in the yolk sac. The function is transferred to liver by 10th week of gestation and to spleen and bone marrow beyond that.


2. Amniotic Fluid


Adequate renal function and normal amniotic fluid production is NOT required in the fetus for which one of the following functions?


a) Providing space for growth and movement.

b) Excretion of waste products.

c) Protection against infection.

d) Maintenance of temperature.

e) Development of the respiratory system.


Correct Answer: b) Excretion of waste products. Urine production is the major contributor to amniotic fluid, but in the fetus the placenta is the organ responsible for the removal of waste products. Oligohydramnios can lead to restricted fetal movement and result in contractures. Amniotic fluid contains a number of factors which help prevent against infection. Amniotic fluid helps to insulate the fetus and maintain temperature. Normal amniotic fluid volume is essential for the development of the lungs. Preterm premature rupture of membranes (particularly before 24 weeks' gestation) can cause pulmonary hypoplasia.


3. At what gestational age do fetal breathing movements commence?


a) 12 weeks

b) 20 weeks

c) 30 weeks

d) 36 weeks

e) 40 weeks


Correct Answer: a) 12 weeks. The movements increase in frequency and strength further on in the gestational period. The movements also increase after maternal meals, acidosis and are reduced by hypoxia, maternal alcohol consumption and sedative drugs.


4. Meconium is found in the fetal gut from what gestational age?


a) 4 weeks of gestation

b) 14 weeks of gestation

c) 24 weeks of gestation

d) 34 weeks of gestation

e) 40 weeks of gestation


Correct Answer: b) 14 weeks. Meconium is found in the fetal gut from 14 weeks of gestation but the passage of meconium is rare before 34 weeks of gestation.


5. Fetal urine


Fetal urine is an important contributor to the amniotic fluid volume. At what gestation does fetal urine become the major contributor to amniotic fluid volume?


a) 10 weeks

b) 12 weeks

c) 14 weeks

d) 16 weeks

e) 18 weeks

Correct Answer: e) 18 weeks. Before that point in gestation, the major contributor to amniotic fluid volume is the fetal skin and placenta. It is worth noting that at approximately 34 weeks of gestation, there is a full adult compliment of nephrons; however, these are functionally limited.



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Dr. Niraj Mahajan

MD- Gynecologist, Laparoscopic Surgeon, Uro-gynecologist , Infertility specialist & Cosmetic Gynecologist.

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