This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Gynaecology & Obstetrics
Frequency of Braxton Hicks contraction is - 
Select and explain. 
A. One every 2 minutes, B. One every 5 minutes, C. One every 15 minutes, D. None of the above
C: One every 15 minutes
Answer: C: One every 15 minutes 
Explanation: Ans. is 'c' i.e., One every 15 minutesBraxton - Hicks contractionsUterine contractions in pregnancy has been named after Braxton - Hicks who first described this entity.These contractions are irregular, infrequent, spasmodic and painless without any effect on dilatation of cervix.Patient is not conscious about the contractions.The intensity varies between 5 and 25 mmHg.The number increases during the last week or two, when the uterus may contract as often as every 10 to 20 minutes.