Effect of timing of umbilical cord clamping on iron status in Mexican infants: a randomised controlled trial
Delayed clamping of the umbilical cord increases the infant's iron endowment at birth and haemoglobin concentration at 2 months of age. We aimed to assess whether a 2-minute delay in the clamping of the umbilical cord of normal-weight, full-term infants improved iron and haematological status u...
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| Veröffentlicht in: | The Lancet (British edition) 2006-06, Vol.367 (9527), p.1997-2004 |
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| creator | Chaparro, Camila M Neufeld, Lynnette M Tena Alavez, Gilberto Eguia-Líz Cedillo, Raúl Dewey, Kathryn G |
| description | Delayed clamping of the umbilical cord increases the infant's iron endowment at birth and haemoglobin concentration at 2 months of age. We aimed to assess whether a 2-minute delay in the clamping of the umbilical cord of normal-weight, full-term infants improved iron and haematological status up to 6 months of age.
476 mother-infant pairs were recruited at a large obstetrics hospital in Mexico City, Mexico, randomly assigned to delayed clamping (2 min after delivery of the infant's shoulders) or early clamping (around 10 s after delivery), and followed up until 6 months postpartum. Primary outcomes were infant haematological status and iron status at 6 months of age, and analysis was by intention-to-treat. This study is registered with
ClinicalTrials.gov, number NCT00298051.
358 (75%) mother-infant pairs completed the trial. At 6 months of age, infants who had delayed clamping had significantly higher mean corpuscular volume (81·0 fL
vs 79·5 fL 95% CI −2·5 to −0·6, p=0.001), ferritin (50·7 μg/L
vs 34·4 μg/L 95% CI −30·7 to −1·9, p=0·0002), and total body iron. The effect of delayed clamping was significantly greater for infants born to mothers with low ferritin at delivery, breastfed infants not receiving iron-fortified milk or formula, and infants born with birthweight between 2500 g and 3000 g. A cord clamping delay of 2 minutes increased 6-month iron stores by about 27–47 mg.
Delay in cord clamping of 2 minutes could help prevent iron deficiency from developing before 6 months of age, when iron-fortified complementary foods could be introduced. |
| doi_str_mv | 10.1016/S0140-6736(06)68889-2 |
| format | Article |
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476 mother-infant pairs were recruited at a large obstetrics hospital in Mexico City, Mexico, randomly assigned to delayed clamping (2 min after delivery of the infant's shoulders) or early clamping (around 10 s after delivery), and followed up until 6 months postpartum. Primary outcomes were infant haematological status and iron status at 6 months of age, and analysis was by intention-to-treat. This study is registered with
ClinicalTrials.gov, number NCT00298051.
358 (75%) mother-infant pairs completed the trial. At 6 months of age, infants who had delayed clamping had significantly higher mean corpuscular volume (81·0 fL
vs 79·5 fL 95% CI −2·5 to −0·6, p=0.001), ferritin (50·7 μg/L
vs 34·4 μg/L 95% CI −30·7 to −1·9, p=0·0002), and total body iron. The effect of delayed clamping was significantly greater for infants born to mothers with low ferritin at delivery, breastfed infants not receiving iron-fortified milk or formula, and infants born with birthweight between 2500 g and 3000 g. A cord clamping delay of 2 minutes increased 6-month iron stores by about 27–47 mg.
Delay in cord clamping of 2 minutes could help prevent iron deficiency from developing before 6 months of age, when iron-fortified complementary foods could be introduced.</description><identifier>ISSN: 0140-6736</identifier><identifier>EISSN: 1474-547X</identifier><identifier>DOI: 10.1016/S0140-6736(06)68889-2</identifier><identifier>PMID: 16782490</identifier><identifier>CODEN: LANCAO</identifier><language>eng</language><publisher>England: Elsevier Ltd</publisher><subject>Adult ; Anemia ; Anemia, Iron-Deficiency - prevention & control ; Babies ; Constriction ; Data analysis ; Data collection ; Developing countries ; Female ; Ferritins - blood ; Fetal Blood - chemistry ; Fortified foods ; Hematology ; Hospitals ; Humans ; Infant ; Infant Food ; Infant, Newborn ; Infants ; Intervention ; Iron ; Iron - blood ; LDCs ; Male ; Medical procedures ; Mexico ; Mothers ; Nutrient deficiency ; Obstetrics ; Pregnancy ; Risk factors ; Sample size ; Time Factors ; Umbilical Cord - blood supply</subject><ispartof>The Lancet (British edition), 2006-06, Vol.367 (9527), p.1997-2004</ispartof><rights>2006 Elsevier Ltd</rights><rights>Copyright Lancet Ltd. Jun 17-Jun 23, 2006</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c422t-c854504fb8bf5770e4cbad0ceff4ec4dd20d24208c8101a4ae93e59fd62929f3</citedby><cites>FETCH-LOGICAL-c422t-c854504fb8bf5770e4cbad0ceff4ec4dd20d24208c8101a4ae93e59fd62929f3</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://www.proquest.com/docview/199099172?pq-origsite=primo$$EHTML$$P50$$Gproquest$$H</linktohtml><link.rule.ids>314,776,780,3536,27903,27904,64361,64363,64365,65309,72215</link.rule.ids><backlink>$$Uhttps://www.ncbi.nlm.nih.gov/pubmed/16782490$$D View this record in MEDLINE/PubMed$$Hfree_for_read</backlink></links><search><creatorcontrib>Chaparro, Camila M</creatorcontrib><creatorcontrib>Neufeld, Lynnette M</creatorcontrib><creatorcontrib>Tena Alavez, Gilberto</creatorcontrib><creatorcontrib>Eguia-Líz Cedillo, Raúl</creatorcontrib><creatorcontrib>Dewey, Kathryn G</creatorcontrib><title>Effect of timing of umbilical cord clamping on iron status in Mexican infants: a randomised controlled trial</title><title>The Lancet (British edition)</title><addtitle>Lancet</addtitle><description>Delayed clamping of the umbilical cord increases the infant's iron endowment at birth and haemoglobin concentration at 2 months of age. We aimed to assess whether a 2-minute delay in the clamping of the umbilical cord of normal-weight, full-term infants improved iron and haematological status up to 6 months of age.
476 mother-infant pairs were recruited at a large obstetrics hospital in Mexico City, Mexico, randomly assigned to delayed clamping (2 min after delivery of the infant's shoulders) or early clamping (around 10 s after delivery), and followed up until 6 months postpartum. Primary outcomes were infant haematological status and iron status at 6 months of age, and analysis was by intention-to-treat. This study is registered with
ClinicalTrials.gov, number NCT00298051.
358 (75%) mother-infant pairs completed the trial. At 6 months of age, infants who had delayed clamping had significantly higher mean corpuscular volume (81·0 fL
vs 79·5 fL 95% CI −2·5 to −0·6, p=0.001), ferritin (50·7 μg/L
vs 34·4 μg/L 95% CI −30·7 to −1·9, p=0·0002), and total body iron. The effect of delayed clamping was significantly greater for infants born to mothers with low ferritin at delivery, breastfed infants not receiving iron-fortified milk or formula, and infants born with birthweight between 2500 g and 3000 g. A cord clamping delay of 2 minutes increased 6-month iron stores by about 27–47 mg.
Delay in cord clamping of 2 minutes could help prevent iron deficiency from developing before 6 months of age, when iron-fortified complementary foods could be introduced.</description><subject>Adult</subject><subject>Anemia</subject><subject>Anemia, Iron-Deficiency - prevention & control</subject><subject>Babies</subject><subject>Constriction</subject><subject>Data analysis</subject><subject>Data collection</subject><subject>Developing countries</subject><subject>Female</subject><subject>Ferritins - blood</subject><subject>Fetal Blood - chemistry</subject><subject>Fortified foods</subject><subject>Hematology</subject><subject>Hospitals</subject><subject>Humans</subject><subject>Infant</subject><subject>Infant Food</subject><subject>Infant, Newborn</subject><subject>Infants</subject><subject>Intervention</subject><subject>Iron</subject><subject>Iron - blood</subject><subject>LDCs</subject><subject>Male</subject><subject>Medical procedures</subject><subject>Mexico</subject><subject>Mothers</subject><subject>Nutrient deficiency</subject><subject>Obstetrics</subject><subject>Pregnancy</subject><subject>Risk factors</subject><subject>Sample size</subject><subject>Time Factors</subject><subject>Umbilical Cord - blood 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infant's iron endowment at birth and haemoglobin concentration at 2 months of age. We aimed to assess whether a 2-minute delay in the clamping of the umbilical cord of normal-weight, full-term infants improved iron and haematological status up to 6 months of age.
476 mother-infant pairs were recruited at a large obstetrics hospital in Mexico City, Mexico, randomly assigned to delayed clamping (2 min after delivery of the infant's shoulders) or early clamping (around 10 s after delivery), and followed up until 6 months postpartum. Primary outcomes were infant haematological status and iron status at 6 months of age, and analysis was by intention-to-treat. This study is registered with
ClinicalTrials.gov, number NCT00298051.
358 (75%) mother-infant pairs completed the trial. At 6 months of age, infants who had delayed clamping had significantly higher mean corpuscular volume (81·0 fL
vs 79·5 fL 95% CI −2·5 to −0·6, p=0.001), ferritin (50·7 μg/L
vs 34·4 μg/L 95% CI −30·7 to −1·9, p=0·0002), and total body iron. The effect of delayed clamping was significantly greater for infants born to mothers with low ferritin at delivery, breastfed infants not receiving iron-fortified milk or formula, and infants born with birthweight between 2500 g and 3000 g. A cord clamping delay of 2 minutes increased 6-month iron stores by about 27–47 mg.
Delay in cord clamping of 2 minutes could help prevent iron deficiency from developing before 6 months of age, when iron-fortified complementary foods could be introduced.</abstract><cop>England</cop><pub>Elsevier Ltd</pub><pmid>16782490</pmid><doi>10.1016/S0140-6736(06)68889-2</doi><tpages>8</tpages></addata></record> |
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| subjects | Adult Anemia Anemia, Iron-Deficiency - prevention & control Babies Constriction Data analysis Data collection Developing countries Female Ferritins - blood Fetal Blood - chemistry Fortified foods Hematology Hospitals Humans Infant Infant Food Infant, Newborn Infants Intervention Iron Iron - blood LDCs Male Medical procedures Mexico Mothers Nutrient deficiency Obstetrics Pregnancy Risk factors Sample size Time Factors Umbilical Cord - blood supply |
| title | Effect of timing of umbilical cord clamping on iron status in Mexican infants: a randomised controlled trial |
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