| Ongoing evidence against umbilical cord ligation |
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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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| DeMarsh QB Alt HL, Windle WF (1948) Factors incluencing the blood picture of the newborn; studies on sinus blood on the first an third days. American Journal of Diseases of Children 75:860-871 |
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| Stripping the cord |
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| McCausland AM, Homes F, Schumann WR (1949) Management of cord and placental blood and its effect upon the newborn; part I. California Medicine 71(3):190-196. |
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| Obtaining additional blood after separation of the placenta |
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| Landau DB, Goodrich HB, Francka WF, Burns FR (1950) Death of cesarean infants: a theory as to its cause and a method of prevention. Journal of Pediatrics 36:421-426. |
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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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