What if constantly BPD is high (97th percentile) throughout our 3rd trimester.
What does this indicate?

Question

What if constantly BPD is high (>>97th percentile) throughout our 3rd trimester.
What does this indicate?

Accepted Answer

Biparietal diameter (BPD) is a measurement taken during ultrasound scans in pregnancy that indicates the width of a baby's head. If the BPD is consistently high, at the 97th percentile throughout the third trimester, it means that the baby's head is larger than average for that gestational age. Here are a few possible implications:

1. **Normal Variation**: It could simply be a normal variation. Some babies naturally have larger heads, especially if the parents or siblings also have larger heads.

2. **Fetal Macrosomia**: This term describes a baby who is larger than average. Factors contributing to fetal macrosomia include maternal diabetes, obesity, and genetics.

3. **Genetic Factors**: Genetic conditions or familial traits might lead to larger head sizes. If there is a family history of larger heads, this could be normal for your baby.

4. **Hydrocephalus**: This is a condition where there is an accumulation of cerebrospinal fluid in the brain, which can cause the head to enlarge. It is rare but can be detected and monitored through ultrasound.

5. **Measurement Variability**: Sometimes, variations in ultrasound measurements can occur due to the baby's position or slight inconsistencies in measurement techniques.

6. **Potential Delivery Considerations**: A larger head size might impact the delivery method. Your healthcare provider might consider this when planning for labor and delivery.

### What to Do:

1. **Follow-Up Ultrasounds**: Your healthcare provider will likely recommend follow-up ultrasounds to monitor the baby's growth and development.

2. **Consult Your OB/GYN**: Discuss the consistent high BPD with your obstetrician or maternal-fetal medicine specialist. They can provide more context based on your overall pregnancy and any other findings.

3. **Additional Testing**: If there are concerns about potential conditions, your healthcare provider may suggest additional tests or monitoring to ensure the baby's well-being.

4. **Prepare for Delivery**: Depending on the size of the baby and other factors, your healthcare provider may discuss delivery options and any potential complications.

Consistently high BPD measurements should be closely monitored by your healthcare team to ensure both your health and the health of your baby.

What if constantly BPD is high (>>97th percentile) throughout our 3rd trimester. What does this indicate?