The absence of a biophysical variable may reflect:
a. hypoxia.
b. normal periodicity
c. inability of the central nervous system to perform that particular function
d. a & b.
e. a, b & c

2. The normal periodicity of most biophysical variables is:
a. 5 - 10 minutes
b.10 - 15 minutes
c. 15 - 20 minutes
d. 20 - 40 minutes.
e. 40 - 60 minutes

3. Fetal breathing movements are inhibited by all of the following except:
a. smoking
b. alcohol
c. hyperglycemia
d. supine hypotension
e. diazepan

4. All of the following statements are correct except:
a. fetal movement develops between 7.5 and 9 weeks' gestation
b. fetal tone develops between 9 and 12 weeks' gestation.
c. fetal breathing movements are detectable by 17 - 18 weeks' gestation
d. fetal acidosis may result in a reduction of amniotic fluid volume by 17.5 weeks' gestation

5. All of the following statements are correct except:
a. fetal tone is abolished at a pH of 7.10
b. fetal breathing movements are suppressed when the pH falls below 7.2
c. the non-stress test becomes non-reactive when the pH falls below 7.2
d. fetal movement is abolished at a pH of 7.20

6. All of the following statements are correct except:
a. a single pocket of amniotic fluid 2.0 x 1.5 cm is sufficient for the biophysical profile score.
b. fetal state plays a role in interpreting the biophysical profile score
c. the non-stress test is not performed if all of the 4 sonographic parameters of the biophysical profile score are normal
d. there are fewer false positive tests with the biophysical profile score than with the non-stress test

7. All of the following statements are correct except:
a. the corrected perinatal mortality for a normal biophysical profile score within 1 week of the test is 0.8/1000
b. most of the maternal and fetal causes of stillbirth after a normal biophysical profile score are random events that would not be detected by the biophysical profile score .
c. as the perinatal mortality increases so doe the false negative rate of the biophysical profile score
d. the biophysical profile score is equally reliable for fetuses with gastroschisis as for structurally normal fetuses

8. All of the following are correct except:
a. a biophysical profile score of 0 is a rare event with a high perinatal mortality
b. each of the 5 components of the biophysical profile score have equal significance
c. in the severely anemic fetus, intravascular transfusion and a resultant increased oxygen delivery to the fetal brain has resulted in a rapid return of the acute biophysical variables to normal.
d. the biophysical variables are controlled by different central nervous system centers.

9. A biophysical profile score of 8 or 10 occurs:
a. > 95% of the time.
b. 80 - 95% of the time
c. 70 - 79% of the time
d. 60 - 69% of the time
e. 50 - 59% of the time

10. The perinatal mortality associated with a biophysical profile score of 6 is:
a. 1/1000
b. 10/1000
c. 100/1000
d. 300/1000.