Nationwide singleton birth weight percentiles by gestational age in Taiwan, 1998-2002.

There are limited nationwide population-based data about birth weight percentiles by gestational age in Taiwan. The purpose of this study was to develop updated intrauterine growth charts that are population based and contain the information of birth weight percentiles by gestational age for singleton newborns in Taiwan. We abstracted and analyzed the birth registration database from the Ministry of the Interior in Taiwan during the period of 1998-2002 that consisted of over one million singleton births. Percentiles of birth weight for each increment of gestational week from 21 to 44 weeks were estimated using smoothed means and standard deviations. The analyses revealed that birth weight rose with advancing gestational age, with greater slopes during the third trimester and then leveled off beyond 40 weeks of gestational age. The male to female ratio ranged from 1.088 to 1.096. The mean birth weights during the period of 1998-2002 were higher than those previously reported for the period of 1945-1967; while the birth weight distribution and percentile during the period of 1998-2002 were similar to those reported for the period of 1979-1989. The 10th, 50th, and 90th percentiles of birth weigh at 40th gestational age among the male newborns were 2914, 3374, and 3890 g respectively; and for the female newborns 2816, 3250, and 3747 g. At the gestational age of 37 weeks, the 10th, 50th, and 90th percentiles of birth weigh among the male newborns were 2499, 2941, and 3433 g respectively; and for the female newborns 2391, 2832, and 3334 g. From 1998 to 2002, there was a gradual increase in the prevalence of low birth weight and preterm birth together with the percentage of infants born to foreign-born mothers. This study provides the first nationwide singleton intrauterine growth charts in Taiwan that are population-based and gender-specific. The normative data are particularly useful for the investigation of predictors and outcomes of altered fetal growth.

[1]  B. Horta,et al.  Length and ponderal index at birth: associations with mortality, hospitalizations, development and post-natal growth in Brazilian infants. , 1998, International journal of epidemiology.

[2]  C. Ananth,et al.  Trends in fetal growth among singleton gestations in the United States and Canada, 1985 through 1998. , 2002, Seminars in perinatology.

[3]  M. Kramer,et al.  Comparison of birth weight distributions between Chinese and Caucasian infants. , 1995, American journal of epidemiology.

[4]  D. Goodman,et al.  Is more neonatal intensive care always better? Insights from a cross-national comparison of reproductive care. , 2002, Pediatrics.

[5]  T. Arbuckle,et al.  Birth Weight Percentiles by Gestational Age in Canada , 1993, Obstetrics and gynecology.

[6]  A. Colver,et al.  Analysis by gestational age of cerebral palsy in singleton births in north-east England 1970-94. , 2002, Paediatric and perinatal epidemiology.

[7]  L. Waite.  Marriage and Family , 2005 .

[8]  A Ohlsson,et al.  Determinants of preterm birth rates in Canada from 1981 through 1983 and from 1992 through 1994. , 1998, The New England journal of medicine.

[9]  A. Macfarlane,et al.  Recent trends in the incidence of multiple births and associated mortality in England and Wales. , 1996, Archives of disease in childhood. Fetal and neonatal edition.

[10]  S. Amini,et al.  An Analysis of Birth Weight by Gestational Age Using a Computerized Perinatal Data Base, 1975–1992 , 1994, Obstetrics and gynecology.

[11]  V. Beral,et al.  Obstetric outcome of in vitro fertilization pregnancies compared with normally conceived pregnancies , 1993 .

[12]  John W. Tukey,et al.  Exploratory Data Analysis. , 1979 .

[13]  N. Marlow,et al.  Paediatric consequences of fetal growth restriction. , 2004, Seminars in fetal & neonatal medicine.

[14]  P. Doubilet,et al.  Improved Birth Weight Table for Neonates Developed from Gestations Dated by Early Ultrasonography , 1997, Journal of ultrasound in medicine : official journal of the American Institute of Ultrasound in Medicine.

[15]  K. Joseph,et al.  Recent trends in Canadian infant mortality rates: effect of changes in registration of live newborns weighing less than 500 g. , 1996, CMAJ : Canadian Medical Association journal = journal de l'Association medicale canadienne.

[16]  K. Schoendorf,et al.  Changing patterns of low birthweight and preterm birth in the United States, 1981-98. , 2002, Paediatric and perinatal epidemiology.

[17]  S. Sepkowitz,et al.  International rankings of infant mortality and the United States' vital statistics natality data collecting system--failure and success. , 1995, International journal of epidemiology.

[18]  L. River,et al.  Comparison of associated high-risk factors and perinatal outcome between symmetric and asymmetric fetal intrauterine growth retardation. , 1991, American journal of obstetrics and gynecology.

[19]  E. Howell,et al.  International infant mortality rates: bias from reporting differences. , 1994, American journal of public health.

[20]  E. Hey,et al.  BORN TOO SMALL—IS OUTCOME STILL AFFECTED? , 1990, Developmental medicine and child neurology.

[21]  C. Parkinson,et al.  School Achievement and Behaviour of Children Who Were Small‐for‐dates at Birth , 1981, Developmental medicine and child neurology.

[22]  J. Eriksson,et al.  Size at birth as a predictor of mortality in adulthood: a follow-up of 350 000 person-years. , 2005, International journal of epidemiology.

[23]  C. Osmond,et al.  INFANT MORTALITY, CHILDHOOD NUTRITION, AND ISCHAEMIC HEART DISEASE IN ENGLAND AND WALES , 1986, The Lancet.

[24]  R. Yip,et al.  Comparison of birth weight by gestational age between China and the United States. , 1997, Chinese medical journal.

[25]  H. Gjessing,et al.  Birthweight by gestational age in Norway , 2000, Acta obstetricia et gynecologica Scandinavica.

[26]  R W Platt,et al.  A new and improved population-based Canadian reference for birth weight for gestational age. , 2001, Pediatrics.

[27]  G. Breart,et al.  Algorithms for combining menstrual and ultrasound estimates of gestational age: consequences for rates of preterm and postterm birth , 2002, BJOG : an international journal of obstetrics and gynaecology.

[28]  P. Wise,et al.  The Impact of Extreme Prematurity and Congenital Anomalies on the Interpretation of International Comparisons of Infant Mortality , 1995, Obstetrics and gynecology.

[29]  V. Yu.  Assisted reproduction technology, multiple births, and adverse perinatal outcome. , 1998, Croatian Medical Journal.

[30]  M. Kramer,et al.  How does early ultrasound scan estimation of gestational age lead to higher rates of preterm birth? , 2002, American journal of obstetrics and gynecology.

[31]  Ken P Kleinman,et al.  A nearly continuous measure of birth weight for gestational age using a United States national reference , 2003, BMC pediatrics.

[32]  J. Hsu,et al.  Analysis of birth weight and gestational age in Taiwan. , 1991, Journal of the Formosan Medical Association = Taiwan yi zhi.

[33]  J. Himes,et al.  1994–1996 U.S. Singleton Birth Weight Percentiles for Gestational Age by Race, Hispanic Origin, and Gender , 1999, Maternal and Child Health Journal.