| How much more research is needed? |
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| Morley GM. An ethical and interpretive analysis of Early versus delayed umbilical cord clamping in preterm infants (Cochrane Review) http://www.cochranefeedback.com/cf/cda/citation.do?id=9382#9382 |
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| Evidence available for decades (and over a century ago) |
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| Budin, P (1875) A quel moment doit-on pratiquer la ligature du cordon ombilical? Progres Medical 3:750-751, 765-767, (1876) 4:2-3. |
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Schucking, A (1877) Zur Physiologie der Nachgeburtsperiod. Untersuchungen ueber den Placentarkreislauf nach der Geburt des Kindes. Berliner Klinishe Wochenschrift 1877 #1 (1 Jan):5-7 and (8 Jan):18-21. |
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Haselhorst G (1929) Uber Art und Dauer der Blutstromung in den Nabelschnurgefassen post partum. Z Geburtshilfe Gynakol 96:487-499 (Zeitschrift für Geburtshilfe und Gynäkologie) |
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Allmeling A (1930) Die Gewichtszunahme von Neugeborenen infolge postnataler Transfusion. Zentralbl Gynakol 54:850-860. (Zentralblatt für Gynäkologie) |
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Frischkorn HB , Rucker MP (1939) The relationship of the time of ligation of the cord to the red blood count of the infant. Am J Ostet Gynecol 38:592-594. |
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| Ballentine GN (1947) Delayed ligation of the umbilical cord. The Pennsylvania Medical Journal 1947,Apr;50 (7):726-728. |
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| Colozzi AE (1954) Clamping of the umbilical cord; its effect on the placental transfusion. N Engl J Med. 1954 Apr 15;250(15):629-32. |
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Hormann G, Lemtis I (1954) Untersuchungen uber den fetalen Plazentakreislauf warhrend der Nachgeburtsperiode. Zentralblatt fur Gynakologie 76(9):329-341. |
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| Gunther M (1957) The transfer of blood between baby and placenta in the minutes after birth. Lancet. 1957 Jun 22;272(6982):1277-80. |
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| Redmond A, Isana S, Ingall D. (1965) Relation of onset of respiration to placental transfusion. Lancet. 1965 Feb 6;17:283-5 |
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