A stable fetal scalp pH is defined as which value?

A stable fetal scalp pH is defined as which value?

• A. Greater than 7.25
• B. Less than 7.15
• C. 7.20
• D. 7.40

Answer: (A)

Interpreting fetal scalp pH helps gauge fetal well-being during labor by assessing acid-base status as a reflection of placental gas exchange. A higher scalp pH indicates a relatively normal or alkaline environment, meaning the fetus is not acidemic and is tolerating labor well. The value used to define a reassuring, stable fetus is greater than 7.25. Values below this threshold suggest increasing risk of fetal acidosis from hypoxia and may prompt closer monitoring or intervention. A value around 7.20 can be considered borderline, while 7.40 is not the established cutoff for stability in this context.

Interpreting fetal scalp pH helps gauge fetal well-being during labor by assessing acid-base status as a reflection of placental gas exchange. A higher scalp pH indicates a relatively normal or alkaline environment, meaning the fetus is not acidemic and is tolerating labor well. The value used to define a reassuring, stable fetus is greater than 7.25. Values below this threshold suggest increasing risk of fetal acidosis from hypoxia and may prompt closer monitoring or intervention. A value around 7.20 can be considered borderline, while 7.40 is not the established cutoff for stability in this context.