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: Social & Preventive Medicine
Maternal moality rate is calculated as death of a woman upto a period of: September 2005 
Select and explain. 
A. Immediately after delivery, B. 42 days after delivery, C. 7 days after delivery, D. 21 days after delivery
B: 42 days after delivery
Answer: B: 42 days after delivery 
Explanation: Ans. B: 42 days after MMR= Total number of female deaths due to complications of pregnancy, childbih or within 42 days of delivery from 'puerperal causes' in an area during a given year X 1000/Total number of live bihs in the same area and year MMR is a measure of quality of maternity services. The MMR should be expressed as a rate per 1000 live bihs. In developed countries, MMR has declined significantly. Because of this decline, they use the multiplying factor 100,000 instead of 1000 to avoid fractions in calculating MMR.