A nurse is providing preoperative teaching to a client who is undergoing a transcervical sterilization procedure.

Which of the following information should the nurse include?

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.

The correct answer is choice B.Spotting and irregular bleeding are potential adverse effects of the copper IUD.The copper IUD works by creating a toxic environment for sperm and eggs in the uterus and cervix, but it does not affect the hormones that regulate the menstrual cycle.Therefore, it can cause changes in bleeding patterns, such as heavier, longer or more painful periods.

Choice A is wrong because decreased bone density is not a side effect of the copper IUD.It is a possible side effect of hormonal IUDs that contain progestin, which can lower estrogen levels and affect bone health.

Choice C is wrong because mood changes are not a side effect of the copper IUD.They are more likely to occur with hormonal methods of birth control that affect the levels of estrogen and progesterone in the body.

Choice D is wrong because headaches are not a side effect of the copper IUD.They are also more common with hormonal methods of birth control, especially those that contain estrogen.