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A nurse is reviewing the mechanism of action of IUDs with a group of nursing students.

Which of the following statements by a student indicates an understanding of the teaching?

A.

“IUDs immobilize sperm and interfere with their migration from the vagina to the fallopian tubes.”.

B.

“IUDs speed up the transport of the ovum through the fallopian tube.”.

C.

“IUDs inhibit fertilization and cause lysis of the blastocyst.”.

D.

All of the above

Answer and Explanation

The Correct Answer is D

All of the above.

This is because IUDs have multiple mechanisms of action that prevent fertilization and implantation of the ovum. According to the search results, some of these mechanisms are:

  • IUDs immobilize sperm and interfere with their migration from the vagina to the fallopian tubes. This is because copper ions released from copper IUDs are toxic for spermatozoa and impair their motility and viability. Hormonal IUDs also thicken the cervical mucus, which blocks sperm from entering the uterus.
  • IUDs speed up the transport of the ovum through the fallopian tube. This is because IUDs induce a local inflammatory reaction in the endometrium, which affects the signaling between the uterus and the ovary and alters the tubal motility. This reduces the chances of fertilization by shortening the time window for sperm-egg interaction.
  • IUDs inhibit fertilization and cause lysis of the blastocyst. This is because IUDs affect the function or viability of gametes, decreasing the rate of fertilization and lowering the chances of survival of any embryo that may be formed. IUDs also interfere with implantation of the fertilized ovum by creating a hostile environment in the uterine cavity.

Choice A is wrong because it only describes one mechanism of action of IUDs, not all of them.

Choice B is wrong because it only describes another mechanism of action of IUDs, not all of them.

Choice C is wrong because it only describes yet another mechanism of action of IUDs, not all of them.


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Related Questions

Correct Answer is C

Explanation

The correct answer is choice C.“I can start the injections right after I give birth if I am not breastfeeding.” This statement indicates a need for further teaching because medroxyprogesterone injections should not be started until at leastsix weeksafter giving birth if the woman is not breastfeeding.Starting the injections earlier may increase the risk ofbleeding,blood clotsanddecreased milk production.

Choice A is correct because medroxyprogesterone injections are given every12 to 13 weeksfor contraception.

Choice B is correct because medroxyprogesterone injections may causebone lossover time, and calcium supplements may help prevent this.

Choice D is correct because medroxyprogesterone injections often reduce or stop menstrual bleeding by suppressing ovulation and thinning the lining of the uterus.

Correct Answer is A

Explanation

The correct answer is choice A."You may experience weight gain as a side effect of the injection."

Choice B is wrong because you do not need to use a barrier method of contraception for the first week after the injection.Medroxyprogesterone injection provides contraception for three months and works mainly by stopping the release of an egg from the ovary (ovulation).

Choice C is wrong because you should not massage the injection site to promote absorption of the medication.

Massaging the injection site may cause irritation or pain.You should also avoid rubbing or scratching the injection site for a few days after receiving the injection.

Choice D is wrong because you may not resume fertility as soon as you stop the injections.

There may be a delay in your return to normal fertility after you finish using medroxyprogesterone injection.It might take 10 months or more before you begin ovulating again.

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