A case–control study to examine the association between breastfeeding during late pregnancy and risk of a small‐for‐gestational‐age birth in L ima, P eru

Excessive demands on maternal nutritional status may be a risk factor for poor birth outcomes. This study examined the association between breastfeeding during late pregnancy (≥ 28 weeks) and the risk of having a small-for-gestational-age (SGA) newborn, using a matched case-control design (78 SGA cases: birthweight <10th percentile for gestational age; 150 non-SGA controls: 50th percentile <birthweight <90th percentile for gestational age). Between March 2006 and April 2007, project midwives visited daily three government hospitals in Lima, Peru and identified cases and matched controls based on hospital, gestational age, and inter-gestational period. Mothers were interviewed and clinical chart extractions were completed. Factors associated with risk of SGA were assessed by their adjusted odds ratios (aOR) from conditional logistic regression. Exposure to an overlap of breastfeeding during late pregnancy was not associated with an increased risk of having a SGA newborn [aOR=0.58, 95% confidence interval (CI): 0.10-3.30]. However, increased risk was associated with having a previous low-birthweight birth (aOR=6.53; 95% CI: 1.43-29.70) and a low intake of animal source foods (<25th percentile; aOR=2.26; 95% CI: 1.01-5.04), and tended to be associated with being short (<150 cm; aOR=2.05; 95% CI: 0.92-4.54). This study found no evidence to support the hypothesis that breastfeeding during late pregnancy increases the risk for SGA; however, studies with greater statistical power are needed to definitively examine this possible association and clarify whether there are other risks to the new baby, the toddler and the pregnant woman

Birth weight · Breastfeeding · Confidence interval · Gestational age · Logistic regression · Obstetrics · Odds ratio · Percentile · Pregnancy · Risk factor · Small for gestational age · Birth, Development, and Health · Breastfeeding Practices and Influences · Gestational Diabetes Research and Management · Medicine · Internal Medicine · Pediatrics

• Risk factors for low birth weight

  Open Access•Javier Valero de Bernabé, Javier Bernabe et al.•European Journal of Obstetrics &…•2004

  Add to list

• The Risk of Maternal Nutritional Depletion and Poor Outcomes Increases in Early or Closely Spaced Pregnancies

  Open Access•Janet C King•The Journal of Nutrition•2003

  Add to list

• Diet in pregnancy and risk of small for gestational age birth

  Open Access•Elena Ricci, Francesça Chiaffarino et al.•Maternal and Child Nutrition•2009

  Add to list

• Assessment of Risk Factors for Low Birth Weight Deliveries

  Judith N Lasker, Bonnie Coyle et al.•Health Care For Women International•2005

  Add to list