Three women are told about three kinds of IUD: a Lippes loop, a CuT and a Progestasert…
Contributed by StemPy LabTry it on paper first. A hint, the key idea and the worked solution are here when you need them.
Three women are told about three kinds of IUD: a Lippes loop, a CuT and a Progestasert.
- Which of the three releases copper ions?
- Which of the three releases a hormone?
- Which of the three has no medicine at all?
- Which kind also makes the cervix hostile to sperms?
Need a reminder? The key ideaShow
Periodic abstinence avoids coitus on days to of a cycle of days. In the model, ovulation is days before the next period, and the fertile days run from days before ovulation to days after it. Condoms are used once, and they also protect against STIs. An IUD is placed by a trained person. Copper ions reduce the movement of sperms.
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. A Lippes loop, a CuT and a Progestasert.
Plan. Match each name to its kind.
Step 1. Copper. The CuT releases copper ions.
Step 2. Hormone. The Progestasert releases a hormone.
Step 3. No medicine. The Lippes loop is a non-medicated IUD.
Step 4. The cervix. The hormone releasing kind, the Progestasert, also makes the cervix hostile to sperms. It also makes the uterus unsuitable for implantation.
Answer: CuT; Progestasert; Lippes loop; Progestasert.
Check. The three kinds are non-medicated, copper releasing and hormone releasing, and each name belongs to one.
Watch out. The copper IUD acts mainly on the sperms. It does not change the cervix in the way that the hormone releasing kind does.
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