The objective of this study is to perform ultrasound Doppler measurements to evaluate the hemodynamic changes associated with different methods of placental transfusion (Intact umbilical cord milking, cut- umbilical cord milking and delayed cord clamping) in premature neonates over the first days of life.
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Evaluation of superior vena cava flow (SVC) flow by echocardiography
Timeframe: up to 3 days of life
Measurement of fractional shortening (FS) by echocardiography
Timeframe: up to 3 days of life
Evaluation of ejection fraction (EF) by echocardiography
Timeframe: up to 3 days of life
Evaluation of the pulse wave by echocardiography
Timeframe: up to 3 days of life
Evaluation of left ventricular diastolic function by echocardiography
Timeframe: up to 3 days of life
Evaluation of cardiac output (CO)
Timeframe: up to 3 days of life
Evaluation of patent ductus arteriosus (PDA)
Timeframe: up to 3 days of life