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Pregnancy Timeline by SemestersFetal liver is producing blood cellsHead may position into pelvisBrain convolutions beginFull TermWhite fat begins to be madeWhite fat begins to be madeHead may position into pelvisImmune system beginningImmune system beginningPeriod of rapid brain growthBrain convolutions beginLungs begin to produce surfactantSensory brain waves begin to activateSensory brain waves begin to activateInner Ear Bones HardenBone marrow starts making blood cellsBone marrow starts making blood cellsBrown fat surrounds lymphatic systemFetal sexual organs visibleFinger and toe prints appearFinger and toe prints appearHeartbeat can be detectedHeartbeat can be detectedBasic Brain Structure in PlaceThe Appearance of SomitesFirst Detectable Brain WavesA Four Chambered HeartBeginning Cerebral HemispheresFemale Reproductive SystemEnd of Embryonic PeriodEnd of Embryonic PeriodFirst Thin Layer of Skin AppearsThird TrimesterSecond TrimesterFirst TrimesterFertilizationDevelopmental Timeline
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Home | Pregnancy Timeline | News Alerts | News Archive July 12, 2013

 

"The benefits of delayed cord clamping need to be weighed against the small additional risk
of jaundice in newborns. Later cord clamping to increase iron stores might be particularly
beneficial in settings where severe anaemia is common."


Philippa Middleton, Australian Research Centre for Health of Women and Babies ,
Robinson Institute at the University of Adelaide in Adelaide, Australia.




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Late cord clamping increases iron levels in newborns

Delaying clamping of the umbilical cord after birth benefits newborn babies, according to a systematic review published in The Cochrane Library. The authors found babies' blood and iron levels were healthier when the cord was clamped later.

In many high income countries, it is standard practice to clamp the umbilical cord connecting mother and baby less than a minute after birth.

However, clamping the cord too soon may reduce the amount of blood that passes from mother to baby via the placenta, affecting the baby's iron stores. On the other hand, delayed cord clamping, which is carried out more than a minute after birth, may also slightly increase the risk of jaundice.


The World Health Organization now recommends cord clamping between one and three minutes after birth.


The researchers reviewed data from 15 trials involving a total of 3,911 women and their babies. They looked at outcomes for mothers and outcomes for babies separately, and looked at haemoglobin concentrations as an indicator of healthy blood and iron levels.


While clamping the cord later made no difference to the risk of maternal haemorrhaging, blood loss or haemoglobin levels, babies were healthier in a number of respects.

When cord clamping was delayed, babies had higher haemoglobin levels between one and two days after birth and were less likely to be iron-deficient three to six months after birth. Birth weight was also higher with delayed cord clamping.


"In light of growing evidence that delayed cord clamping increases early haemoglobin concentrations and iron stores in infants, a more liberal approach to delaying clamping of the umbilical cord in healthy babies appears to be warranted," said Philippa Middleton, one of the authors of the review based at the Australian Research Centre for Health of Women and Babies, Robinson Institute at the University of Adelaide in Adelaide, Australia.

Clamping the cord later did lead to a slightly higher number of babies needing treatment for jaundice, which is treated by light therapy. "The benefits of delayed cord clamping need to be weighed against the small additional risk of jaundice in newborns," said Middleton. "Later cord clamping to increase iron stores might be particularly beneficial in settings where severe anaemia is common."

Study results are published in The Cochrane Library.

The review focused on the effects of delayed cord clamping when babies were born at full term. Another recent Cochrane review(*1) suggested that there might also be health benefits associated with later cord clamping in babies born preterm.

Full citation: McDonald SJ, Middleton P, Dowswell T, Morris PS. Effect of timing of umbilical cord clamping of term infants on maternal and neonatal outcomes. Cochrane Database of Systematic Reviews 2013, Issue 6. Art. No.: CD004074. DOI: 10.1002/14651858.CD004074.pub3.

URL upon publication: http://doi.wiley.com/10.1002/14651858.CD004074.pub3

Reference:
*1. Rabe H, Diaz-Rossello JL, Duley L, Dowswell T. Effect of timing of umbilical cord clamping and other strategies to influence placental transfusion at preterm birth on maternal and infant outcomes. Cochrane Database of Systematic Reviews 2012, Issue 8. Art. No.: CD003248. DOI: 10.1002/14651858.CD003248.pub3.

Original press release: