Maternal weight gain ranges for optimal fetal growth in Japanese women.
OBJECTIVE
To identify adequate weight gain ranges during pregnancy in Japanese women.


METHODS
Obstetric records from 2001 to 2002 for 46,659 term, singleton, vaginally delivered live births was used to estimate IUGR and macrosomia risk. Total maternal weight gain was grouped according to gestational age-specific percentile values of weight gain as follows: "very low" (under the 25th), "low" (25th to 49th), "moderate" (50th to 74th), "high" (75th to 89th), and "very high" (90th and over).


RESULTS
About 6% of infants were identified as having IUGR and 0.9% as macrosomia. IUGR risk was elevated with low weight gains. Macrosomia risk was related to high weight gains and previous spontaneous abortions.


CONCLUSIONS
Achieving weight gains between the 50th and 75th percentiles for gestational age was considered adequate for optimal fetal growth in Japanese pregnant women.
Takimoto
H
H
Section of Maternal and Child Health, Department of Health Promotion and Research, National Institute of Public Health, Saitama, Japan. thidemi@niph.go.jp
Sugiyama
T
T
Fukuoka
H
H
Kato
N
N
Yoshiike
N
N
D000328:Adult; D001724:Birth Weight; D015992:Body Mass Index; D015331:Cohort Studies; D016001:Confidence Intervals; D005260:Female; D047109:Fetal Development; D005317:Fetal Growth Retardation / Q000175:diagnosis* / Q000453:epidemiology; D005320:Fetal Macrosomia / Q000175:diagnosis* / Q000453:epidemiology; D005865:Gestational Age; D006801:Humans; D015994:Incidence; D007564:Japan / Q000453:epidemiology; D008423:Maternal Age; D008429:Maternal Welfare; D016017:Odds Ratio; D010298:Parity; D011247:Pregnancy; D011296:Prenatal Diagnosis / Q000379:methods; D011336:Probability; D012042:Registries; D018570:Risk Assessment; D015430:Weight Gain