Fetal hemodynamic changes after amniotomy

Abstract

Amniotomy is associated with significant reduction in the impedance of the fetal MCA and the renal artery. The former may be a result of fetal stress response and the latter could be related to the release of vasoactive substances after amniotomy.

Cardiac troponin T and amino-terminal pro-natriuretic peptide concentrations in fetuses in the second trimester and in healthy neonates

“…An intriguing finding of this study is that, within the term group, NT-proBNP concentrations were significantly higher in women delivering by pre-labor elective cesarean section than in women delivering spontaneously (p-0.001), and higher than in women delivering by cesarean section during active labor, although not statistically significant (p-0.081). Doppler evaluation of renal-artery blood flow in the human fetus during labor has shown that blood impedance is reduced after membrane rupture (18). At present, we can only speculate about the mechanism leading to the significant fall of NT-proBNP concentrations apparently induced by labor.…”

Regional variations in childbirth interventions and their correlations with adverse outcomes, birthplace and care provider: A nationwide explorative study

“…AROM may reduce the length of time of labour [4] and it might, therefore, decrease the need for augmentation of labour with oxytocin [4]. On the other hand, some concerns about possible adverse effects have been suggested [4,49]. The WHO states there should be a valid reason for the artificial rupturing of the membranes in normal labour [44], but there are no national guidelines on indications for AROM in the Netherlands.…”