Which of the following is a sign of pregnancy-induced hypertension (PIH) during the second trimester?

The correct choice regarding a sign of pregnancy-induced hypertension (PIH) during the second trimester is the sudden weight gain of 3 lbs or more. In the context of PIH, sudden weight gain can indicate fluid retention associated with increased blood pressure and potential cardiovascular strain. During pregnancy, weight gain should generally follow a gradual pattern, and a sudden increase can signify the body’s reaction to developing hypertension.

While sudden weight gain of more than 5 lbs also indicates a potential issue, the criteria for concern can start with a lower threshold of 3 lbs, making it an early indicator that warrants further monitoring for signs of hypertension or preeclampsia.

Though significant headaches are also associated with PIH, they are not a definitive early sign and can arise from various other pregnancy-related complaints. Additionally, proteinuria, which is significant in diagnosing preeclampsia, is typically assessed at thresholds greater than 300 mg in a 24-hour urine collection. Therefore, having proteinuria less than 300 mg does not confirm or indicate PIH and might not reflect the serious implications of elevated blood pressure.

Overall, the correct answer highlights an important and early clue in the development of pregnancy-induced hypertension.