There are no rest-activity dependent changes in fetal ductus arteriosus flow velocity patterns at 27-29 weeks of gestation.
Blood flow velocity waveforms recorded in the fetal ductus arteriosus were related to fetal heart rate pattern (FHRP) in 13 normal pregnancies at 27-29 weeks of gestation. Recording time was always 65 min or more. In three women no low fetal heart rate (FHRP-A) variability was present, in the remaining 10 women high fetal heart rate (FHRP-B) variability was established in 80% of the recording time. There was no statistically significant difference between FHRP-A and FHRP-B pattern for all ductal flow velocity parameters, indicating rest-activity state independency in late second and early third trimester pregnancy.
Brezinka
C
C
Department of Obstetrics and Gynaecology, Academic Hospital Rotterdam Dijkzigt, Netherlands.
Huisman
T W
TW
Stijnen
T
T
Wladimiroff
J W
JW
D000204:Activity Cycles / Q000502:physiology*; D001783:Blood Flow Velocity; D004373:Ductus Arteriosus / Q000196:embryology* / Q000502:physiology*; D005260:Female; D005865:Gestational Age; D006340:Heart Rate, Fetal; D006801:Humans; D011247:Pregnancy