title: Gestational weight gain as predicted by pregestational body mass index and gestational age in Mexican women.
abstract: OBJECTIVE
  To develop a reference pattern to evaluate gestational weight according to pregestational body mass index (BMI) and gestational age, using current longitudinal information from healthy pregnant women.
  
  
  METHODS
  We followed 438 women with singleton pregnancies between weeks 16 and 36 of pregnancy Women were excluded if they developed pathologic conditions during gestation, delivered malformed or dead fetuses, or delivered babies with a birthweight of less than 2500 or more than 4200 g or with a gestational age of less than 37 or more than 41 weeks. Weight, biochemical indicators, and clinical indicators were recorded every 4 weeks throughout the pregnancy. Data were analyzed by sequential regressions.
  
  
  RESULTS
  Four equations for maternal predicted weight across categories of pregestational BMI (underweight, normal, overweight, and obese) and gestational ages were developed and synthesized in a table of reference values.
  
  
  CONCLUSIONS
  Optimal weight and weight gain during pregnancy can be estimated with our equations, which are corrected for pregestational BMI and gestational age.
authors.affiliation: Instituto Nacional de Perinatología Isidro Espinosa de los Reyes, Public Health Research Branch, Mexico.
authors.forename: Esther
authors.initials: E
authors.lastname: Casanueva
authors.forename: María Eugenia
authors.initials: ME
authors.lastname: Flores-Quijano
authors.forename: María Emila
authors.initials: ME
authors.lastname: Roselló-Soberón
authors.forename: Luz María
authors.initials: LM
authors.lastname: De-Regil
authors.forename: Reyna
authors.initials: R
authors.lastname: Sámano
mesh_terms: D000293:Adolescent; D000328:Adult; D001724:Birth Weight / Q000502:physiology; D001827:Body Height / Q000502:physiology; D015992:Body Mass Index; D001835:Body Weight / Q000502:physiology; D002648:Child; D005260:Female; D005865:Gestational Age; D006801:Humans; D007231:Infant, Newborn; D008800:Mexico; D011237:Predictive Value of Tests; D011247:Pregnancy; D012016:Reference Values; D015430:Weight Gain / Q000502:physiology*; D055815:Young Adult