Which pregnant client requires priority anticipatory teaching during the first trimester?

The correct choice emphasizes the importance of anticipatory teaching regarding food safety and the risks associated with gardening and consuming homegrown vegetables during pregnancy. Pregnant individuals are at a higher risk for foodborne illnesses, such as listeriosis and toxoplasmosis, which can be transmitted through contaminated soil, vegetables, or even through contact with fecal matter from animals. It is essential for the client who gardens to be informed about proper handwashing techniques, safe gardening practices, and the need to thoroughly wash or cook vegetables before consumption.

In contrast, other choices do not present immediate concerns that require urgent teaching. Gaining 4 lb from prepregnancy weight can be considered within a healthy range for most women in the first trimester; thin, milky white vaginal discharge is generally normal in pregnancy; and practicing yoga and swimming are typically safe activities with little risk involved. Therefore, the client who gardens has specific health considerations that warrant focused discussion and planning to ensure a safe pregnancy.