What age group has the highest rates of STD infection?

Choice A reason: Using male condoms is one of the most effective ways to prevent the transmission of STDs, especially those caused by viruses or bacteria. However, condoms are not 100% foolproof and may not protect against some STDs that can be spread by skin-to-skin contact, such as herpes or HPV.

Choice B reason: Having multiple sex partners increases the risk of getting an STD, as it exposes the person to more potential sources of infection. The more partners a person has, the more likely they are to encounter someone who has an STD or does not know their status.

Choice C reason: Delaying sexual relations as long as possible is another way to lower the risk of getting an STD, as it reduces the number of sexual exposures and the chances of encountering an infected partner. Young people are especially vulnerable to STDs, as they may have less knowledge, experience, or access to preventive measures.

Choice D reason: All of the above choices are valid ways to lower the risk of getting an STD, but none of them are sufficient on their own. The best way to prevent STDs is to practice abstinence or be in a mutually monogamous relationship with a tested and uninfected partner. Additionally, regular testing, screening, and treatment are essential for detecting and curing STDs before they cause serious complications.

Choice A reason: Infection is not a common cause of IUGR, as most infections do not cross the placenta and affect the fetal growth. However, some infections such as cytomegalovirus, rubella, or toxoplasmosis can cause congenital anomalies and IUGR.

Choice B reason: Previous preterm birth is not a direct cause of IUGR, as it does not affect the current pregnancy. However, it may indicate an underlying maternal or fetal condition that could increase the risk of IUGR, such as cervical incompetence, placental abruption, or preeclampsia.

Choice C reason: Utero-placental insufficiency is the most common cause of IUGR, as it reduces the blood flow and oxygen delivery to the fetus. It can result from maternal factors such as hypertension, diabetes, smoking, or drug abuse, or from placental factors such as placenta previa, placental infarction, or cord compression.

Choice D reason: Chronic hypertension is a risk factor for IUGR, as it can lead to utero-placental insufficiency and fetal hypoxia. However, it is not the only cause of IUGR, as other factors can also affect the placental function and fetal growth.