Future research should begin in the past
In his commentary on the Cochrane Review, George Morley stated that it was
unethical for any more  studies to have been done subsequent to one
conducted in 1993, which clearly showed the benefits of delayed clamping of
the umbilical cord in premature infants.  Randomized controlled studies imply
that informed consent is not part of the procedure - tough luck for the parents
who may then spend the rest of their lives struggling to help a handicapped
child.
My sense is that the results of myriad studies made it clear that waiting for
pulsations of the cord to cease is the safest course - beginning with those of
Budin in 1875, Schucking in 1877, and certainly those of Haselhorst (1929),
Allmeling (1930), Frischkorn & Rucker (1939), Windle (1940, 1941, 1942,
1948), Ballentine (1947), Colozzi (1954), Gunther (1957), and Redmond et al.
(1965).  The evidence from these investigations remain valid even though not
made recently.
How many more lives need to be ruined from the outset, and families left to
cope with the catastrophe, while academicians continue to clamor that more
research needs to be done?  The evidence has been available for decades.