A WHO handbook gives these figures for typical use, as pregnancies in the first year among 100…
Contributed by StemPy LabTry it on paper first. A hint, the key idea and the worked solution are here when you need them.
A WHO handbook gives these figures for typical use, as pregnancies in the first year among users: the male condom , the combined pill and the copper releasing IUD . A programme follows couples for a year, with all of them using one method.
- How many pregnancies are expected if they all use the male condom?
- How many if they all use the combined pill?
- How many if they all use the copper releasing IUD?
- How many more pregnancies does the condom give than the IUD?
Need a reminder? The key ideaShow
A failure rate is the number of pregnancies in the first year among users. Among couples, about pregnancies are expected in a year. The chance of at least one pregnancy in years is . Only the condom, among the methods of this chapter, protects against STIs. Vasectomy and tubectomy are terminal methods.
The worked solution
Have you tried it?
Work it out on paper first. It is fine to get stuck or make a mistake: that is how we learn. When you are ready, go through the solution one step at a time, and check each step against your own.
Given. couples. Rates: , and pregnancies per users in a year.
Plan. Find the number of lots of couples, and multiply by the rate.
Step 1. Lots. lots.
Step 2. The condom. pregnancies.
Step 3. The pill. pregnancies.
Step 4. The IUD. pregnancies.
Step 5. The difference. pregnancies.
Answer: ; ; ; .
Check. The order of the answers follows the order of the rates: .
Watch out. This topic is not in the NEET syllabus. The figures are typical use, and perfect use gives smaller numbers.
Source. WHO and Johns Hopkins CCP (2018), Family Planning: A Global Handbook for Providers, 3rd edition.
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