The Claim
Maternal Valsalva maneuver during fetal middle cerebral artery Doppler ultrasonography has no significant effect on pulsatility index, resistance index, end-diastolic velocity, or mean flow velocity in healthy pregnancies.
What the research says
Supports is higher
Support is ahead, but a single strong opposing study can change this.
These are independent scores, not a percentage. Higher-grade studies count more, so a single strong opposing study can outweigh several weaker ones.
When a pregnant woman holds her breath during a baby's ultrasound, it doesn't change the blood flow measurements in the baby's brain — so doctors can still trust those readings.
See the scientific wording
Maternal Valsalva maneuver during fetal middle cerebral artery Doppler ultrasonography has no significant effect on pulsatility index, resistance index, end-diastolic velocity, or mean flow velocity, suggesting that maternal breath-holding maneuvers do not confound fetal cerebral blood flow measurements in healthy pregnancies.
What the research says
1 studyThe study found that when moms hold their breath (Valsalva maneuver), it doesn’t change the baby’s brain blood flow readings during ultrasound. So, doctors can trust these measurements even if the mom holds her breath.
Score breakdown, mechanism chain, raw evidence, ideal studies needed & 1 supporting studies
Not medical advice. For informational purposes only. Always consult a qualified healthcare professional before making health decisions.