Intrauterine growth restriction (IUGR) is associated with numerous pregnancy-related risk factors except:

Choice A reason: According to the CDC, nearly half (46%) of all new STDs occur among people between the ages of 15-24¹. This age group also has the highest rates of chlamydia, gonorrhea, and syphilis infections compared to other age groups. Some factors that contribute to this high burden of STDs among young people are biological, behavioral, and social.

Choice B reason: This is incorrect. The age group of 51-60 years old has lower rates of STD infection than the age group of 15-24 years old. According to the CDC, the reported rates of chlamydia, gonorrhea, and syphilis among 51-60 year olds in 2020 were 59.8, 54.7, and 12.4 per 100,000 population, respectively. These rates are much lower than the rates among 15-24 year olds, which were 1,583.3, 1,021.9, and 45.5 per 100,000 population, respectively.

Choice C reason: This is incorrect. The age group of 25-35 years old has lower rates of STD infection than the age group of 15-24 years old. According to the CDC, the reported rates of chlamydia, gonorrhea, and syphilis among 25-35 year olds in 2020 were 1,017.9, 1,015.6, and 66.9 per 100,000 population, respectively. These rates are lower than the rates among 15-24 year olds, which were 1,583.3, 1,021.9, and 45.5 per 100,000 population, respectively.

Choice D reason: This is incorrect. The age group of 36-50 years old has lower rates of STD infection than the age group of 15-24 years old. According to the CDC, the reported rates of chlamydia, gonorrhea, and syphilis among 36-50 year olds in 2020 were 316.6, 337.9, and 27.9 per 100,000 population, respectively. These rates are lower than the rates among 15-24 year olds, which were 1,583.3, 1,021.9, and 45.5 per 100,000 population, respectively.

Choice A reason: Herpes simplex virus is incorrect because it is not the infection described in the question. It is transmitted through direct contact with the skin or mucous membranes of someone who is infected, usually through oral or genital sex. Symptoms include painful blisters and sores in the mouth or genitals. It does not cause life-threatening infections, but it can increase the risk of other sexually transmitted infections.

Choice B reason: Human papillomavirus is incorrect because it is not the infection described in the question. It is transmitted through direct contact with the skin or mucous membranes of someone who is infected, usually through genital sex. Symptoms include genital warts and cervical cancer. It does not cause life-threatening infections, but it can increase the risk of other cancers.

Choice C reason: Human immunodeficiency virus is correct because it is the infection described in the question. It is transmitted through direct contact with the blood or body fluid of someone who is infected, usually through unprotected sex, sharing needles, or passed from a mother to a baby at birth. Symptoms may take 10 years or more to show. Once they appear, the person is susceptible to life-threatening infections, such as pneumonia, tuberculosis, or cancer. This condition is also known as acquired immunodeficiency syndrome (AIDS).

Choice D reason: Cytomegalovirus is incorrect because it is not the infection described in the question. It is transmitted through direct contact with the saliva, urine, or breast milk of someone who is infected, usually through kissing, sexual contact, or breastfeeding. Symptoms are usually mild or absent in healthy people, but they can be serious in people with weakened immune systems or unborn babies. It does not cause life-threatening infections, but it can cause birth defects, hearing loss, or vision problems.