The overall number of cases of STIs is:

Choice A reason: Reducing stress level is a good practice for a pregnant client, as it can lower the risk of complications such as preterm labor, hypertension, and low birth weight. Therefore, this statement does not indicate a need for further teaching.

Choice B reason: Using only nonprescription medications while pregnant is a dangerous and incorrect practice, as some over-the-counter drugs can harm the fetus or cause birth defects. The client should always consult with their doctor before taking any medication, whether prescription or nonprescription. Therefore, this statement indicates a need for further teaching.

Choice C reason: Monitoring weight gain during pregnancy is a recommended practice, as it can help the client and the doctor assess the health and growth of the fetus. The client should follow the guidelines for appropriate weight gain based on their pre-pregnancy body mass index (BMI). Therefore, this statement does not indicate a need for further teaching.

Choice D reason: Telling the doctor before using home remedies for nausea is a prudent practice, as some herbal or natural remedies can interact with medications or cause adverse effects on the fetus. The client should also avoid self-medication and seek medical advice for persistent or severe nausea. Therefore, this statement does not indicate a need for further teaching.

Choice A reason: Strategies to enhance condom use is correct because it is the most effective way to motivate clients to use condoms consistently and correctly. Some of these strategies include providing education, demonstrating skills, addressing barriers, and promoting communication.

Choice B reason: Places to carry condoms safely is incorrect because it is not the most essential component of counseling related to the prevention of sexually transmitted infections and human immunodeficiency virus. It is a practical aspect of condom use, but it does not address the underlying attitudes, beliefs, and behaviors that influence condom use.

Choice C reason: Leaving the decision up to the male partner is incorrect because it is not a way to motivate clients to use condoms. It is a passive and disempowering approach that can increase the risk of infection and unwanted pregnancy. Clients should be encouraged to take an active role in their sexual health and negotiate condom use with their partners.

Choice D reason: Choice of colors and special features is incorrect because it is not the most essential component of counseling related to the prevention of sexually transmitted infections and human immunodeficiency virus. It is a superficial aspect of condom use, but it does not address the underlying attitudes, beliefs, and behaviors that influence condom use.