Which complication could occur as a result of percutaneous umbilical blood sampling (PUBS)?
Correct Answer: B
Rationale: The correct answer is B: Fetal bradycardia. During PUBS, a needle is inserted into the umbilical cord to obtain fetal blood for testing. This procedure carries a risk of causing fetal bradycardia, which is a decrease in the fetal heart rate. This can be a serious complication as it may indicate fetal distress. It is important to monitor the fetal heart rate during and after the procedure to detect and address any signs of bradycardia promptly.
Other choices are incorrect because:
A: Postdates pregnancy - PUBS is not known to cause postdates pregnancy.
C: Placenta previa - PUBS is not associated with the development of placenta previa.
D: Uterine rupture - PUBS does not typically lead to uterine rupture.
In summary, fetal bradycardia is the potential complication of PUBS due to the invasive nature of the procedure and the risk of affecting fetal well-being.