Asian women had body weight less than 45 kg; 40% of
which were classified as underweight(1). The causes of
underweight may be due to genetics, lack of food, or
secondary to underlying disease(2). There is evidence
that individuals with underweight are at increased risk
of anemia, poor immune response, and osteoporosis(3).
Focusing on the impact of thin body habitus on perinatal
outcomes, a few studies reported that maternal
underweight was significantly related to small-forgestational
age (SGA), low birth weight (LBW), and
preterm infants(4-6). Inadequate gestational weight gain
was also found to associate with adverse neonatal
outcomes(7). However, the number of these studies is
limited. Moreover, the recommended criteria for
diagnosing underweight varied from body mass index
(BMI)
Asian women had body weight less than 45 kg; 40% ofwhich were classified as underweight(1). The causes ofunderweight may be due to genetics, lack of food, orsecondary to underlying disease(2). There is evidencethat individuals with underweight are at increased riskof anemia, poor immune response, and osteoporosis(3).Focusing on the impact of thin body habitus on perinataloutcomes, a few studies reported that maternalunderweight was significantly related to small-forgestationalage (SGA), low birth weight (LBW), andpreterm infants(4-6). Inadequate gestational weight gainwas also found to associate with adverse neonataloutcomes(7). However, the number of these studies islimited. Moreover, the recommended criteria fordiagnosing underweight varied from body mass index(BMI) <18.5 kg/m2 to <20 kg/m2 (8-10). The definition ofinadequate weight gain in underweight gravidas alsoranged from <12 kg to <12.7 kg throughout pregnancy(8-10).
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