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?
“IUDs immobilize sperm and interfere with their migration from the vagina to the fallopian tubes.”.
“IUDs speed up the transport of the ovum through the fallopian tube.”.
“IUDs inhibit fertilization and cause lysis of the blastocyst.”.
All of the above
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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Correct Answer is C
Explanation
The correct answer is choice C. Increased risk of HIV transmission.According to some sources, spermicide that contains nonoxynol-9 (N-9) can irritate sensitive genital tissues, especially if used several times a day.
This irritation can increase the risk of HIV and other sexually transmitted infections by giving infections an easy pathway into the body.
Choice A is wrong because vaginal dryness is not a common side effect of spermicide.
Choice B is wrong because bacterial vaginosis is not directly linked to spermicide use.
Choice D is wrong because cervical cancer is not caused by spermicide use.
Spermicide is a type of contraceptive that works by stopping sperm from reaching an egg.
It comes in different forms such as gels, creams, foams, films or suppositories.It needs to be inserted into the vagina before sex and used correctly every time for it to be effective.
Correct Answer is B
Explanation
The correct answer is choice B. It can decrease menstrual loss and dysmenorrhea.According to, progestin IUDs can make your periods lighter and less painful.
This is a benefit for women who have heavy or painful periods.
Choice A is wrong because it can prevent Asherman’s syndrome.
Asherman’s syndrome is a condition where scar tissue forms in the uterus, which can cause infertility or miscarriage.
Progestin IUDs do not prevent this condition.
Choice C is wrong because it can remain in the uterus for up to 10 years.
Progestin IUDs have different durations of effectiveness depending on the type and brand.For example, Liletta can last up to 8 years, Mirena up to 7 years, and Skyla/Kyleena up to 5 years.
Choice D is wrong because it can protect against sexually transmitted infections.
Progestin IUDs do not protect against STIs.
You should use condoms with new partners to prevent STIs
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