Home
Ebooks
Questions
Search

A contraceptive “X” is used by 100 couples for continuous period of 2 years. During this period 20 women become pregnant despite using contraceptive “X”. What is the pearl index of contraceptive “X”?

Question Category:
Correct Answer:
10 per HWY
Description:
- The Pearl index is defined as the number of "failures per 100 woman-years of exposure (HWY)." - This rate is given by the formula : - PI = Total accidental pregnancies x 1200/ Total months of exposure In given question: Total accidental pregnancies=20 Total months of exposure=100 couples x 24 months each=2400 months PI = 20 x1200/ 2400 =10 per HWY
Get More
Subject Mock Tests

Practice with over 200,000 questions from various medical subjects and improve your knowledge.

Attempt a mock test now
Mock Exam

Take an exam with 100 random questions selected from all subjects to test your knowledge.

Coming Soon
Get More
Subject Mock Tests

Try practicing mock tests with over 200,000 questions from various medical subjects.

Attempt a mock test now
Mock Exam

Attempt an exam of 100 questions randomly chosen from all subjects.

Coming Soon

© 2025 MedicalMCQ. All rights reserved.