A nurse is caring for a client who is taking COCs and reports nausea.

The nurse should advise the client to

The correct answer is choice A.COCs can reduce the risk of endometrial, ovarian and colon cancer.This is because COCs suppress ovulation and reduce inflammation in the genital tract, which may lower the exposure to carcinogens and mutagens.

Choice B is wrong because COCs do not increase bone density or prevent osteoporosis.In fact, some studies have suggested that COCs may have a negative effect on bone mineral density.

Choice C is wrong because COCs do not enhance fertility or improve menstrual regularity.

COCs prevent pregnancy by inhibiting ovulation, which means that they temporarily suppress fertility.COCs may also cause irregular bleeding or amenorrhea in some women.

Choice D is wrong because COCs do not lower blood pressure or cholesterol levels.On the contrary, COCs may increase the risk of hypertension and dyslipidemia in some women, especially those who smoke, are obese, or have a family history of cardiovascular disease.

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.