Best method of assessing foetal well being at term is by serial estimation of :
**Core Concept**
The assessment of fetal well-being at term involves evaluating various parameters to ensure the fetus is developing normally and not at risk of complications. One of the key methods is through the estimation of fetal biophysical parameters, such as movements, tone, and breathing.
**Why the Correct Answer is Right**
Serial estimation of amniotic fluid index (AFI) is the best method of assessing fetal well-being at term. This is because AFI is a reliable indicator of fetal urine production, which is essential for fetal growth and development. A decrease in AFI may indicate fetal distress or compromise, prompting further evaluation and intervention. The estimation of AFI involves measuring the deepest vertical pocket (DVP) of amniotic fluid in the four quadrants of the uterus using ultrasound.
**Why Each Wrong Option is Incorrect**
* **Option A:** Serial estimation of maternal serum alpha-fetoprotein (MSAFP) is not a reliable method for assessing fetal well-being at term. While MSAFP can be used to screen for certain fetal anomalies, it is not a direct indicator of fetal health.
* **Option B:** Serial estimation of maternal serum beta-hCG (β-hCG) is also not a reliable method for assessing fetal well-being at term. β-hCG is a marker of pregnancy, but it does not directly reflect fetal health or well-being.
* **Option C:** Serial estimation of maternal serum estriol (uE3) is not a reliable method for assessing fetal well-being at term. While uE3 is a marker of fetal well-being, it is typically used in conjunction with other markers, such as AFP and β-hCG, as part of a comprehensive screening test.
**Clinical Pearl / High-Yield Fact**
It is essential to remember that the estimation of AFI is a dynamic process, and serial measurements should be taken over time to assess changes in fetal well-being.
**Correct Answer: C. Amniotic fluid index (AFI) is the best method of assessing fetal well-being at term.**