References
- World Health Organization. International statistical classification of diseases and related health problems, 10th revision. Vol 2. Geneva, Switzerland: World Health Organization; 1993.
- Ananth CV, Vintzileos AM. Epidemiology of preterm birth and its clinical subtypes. J Matern Fetal Neonatal Med 2006;19:773–782.
- Kramer MS. Determinants of low birth weight: methodological assessment and meta-analysis. Bull World Health Organ 1987;65:663–737.
- Kramer MS. Intrauterine growth and gestational duration determinants. Pediatrics 1987;80:502–511.
- Villar J, Belizan JM. The relative contribution of prematurity and fetal growth retardation to low birth weight in developing and developed societies. Am J Obstet Gynecol 1982;143:793–798.
- De Muylder X. Perinatal mortality audit in Zimbabwean district. Paediatr Perinat Epidemiol 1989;3:284–293.
- McCormick, MC. The contribution of low birth weight to infant mortality and childhood morbidity. N Engl J Med 1985;312:82–90.
- Van den Broek N, Ntonya C, Kayira E, White S, Neilson JP. Preterm birth in rural Malawi: high incidence in ultrasound-dated population. Hum Reprod 2005;20:3235–3237.
- Watson-Jones D, Weiss HA, Changalucha JM, Todd J, Gumodoka B, Bulmer J, Balira R, Ross D, Mugeye K, Hayes R, et al Adverse birth outcomes in United Republic of Tanzania – impact and prevention of maternal risk factors. Bull World Health Organ 2007;85:9–18.
- Feresu SA, Harlow SD, Woelk GB. Risk factors for prematurity at Harare Maternity Hospital, Zimbabwe. Int J Epidemiol 2004;33:1194–1201.
- Berkowitz GS, Blackmore-Prince C, Lapinski RH, Savitz DA. Risk factors for preterm birth subtypes. Epidemiology 1998;9:279–285.
- Ananth CV, Savitz DA, Luther ER, Bowes WA Jr. Preeclampsia and preterm birth subtypes in Nova Scotia, 1986 to 1992. Am J Perinatol 1997;14:17–23.
- Meis PJ, Michielutte R, Peters TJ, Wells HB, Sands RE, Coles EC, Johns KA. Factors associated with preterm birth in Cardiff, Wales. II. Indicated and spontaneous preterm birth. Am J Obstet Gynecol 1995;173:597–602.
- Meis PJ, Goldenberg RL, Mercer BM, Iams JD, Moawad AH, Miodovnik M, Menard MK, Caritis SN, Thurnau GR, Bottoms SF. The preterm prediction study: risk factors for indicated preterm births. Maternal-fetal medicine units network of the national institute of child health and human development. Am J Obstet Gynecol 1998;178:562–567.
- Gardner MO, Goldenberg RL, Cliver SP, Tucker JM, Nelson KG, Copper RL. The origin and outcome of preterm twin pregnancies. Obstet Gynecol 1995;85:553–557.
- Ananth CV, Vintzileos AM. Maternal-fetal conditions necessitating a medical intervention resulting in preterm birth. Am J Obstet Gynecol 2006;195:1557–1563.
- Adam I, Babiker S, Mohmmed AA, Salih MM, Prins MH, Zaki ZM. Low body mass index, anaemia and poor perinatal outcome in a rural hospital in Eastern Sudan. J Trop Pediatr 54:202–204.
- Salihu HM, Lynch O, Alio AP, Liu J. Obesity subtypes and risk of spontaneous versus medically indicated preterm births in singletons and twins. Am J Epidemiol 2008;168:13–20.
- Smith GCS, Pell JP, Cameron AD, Dobbie R. Risk of perinatal death associated with labor after previous caesarean delivery in uncomplicated term pregnancies. JAMA 2002;287:2684–2690.
- Smith GCS, Pell JP, Dobbie R. Caesarean section and risk of unexplained stillbirth in subsequent pregnancy. Lancet 2003;362:1779–1784.
- Xiong X, Buekens P, Vastardis S, Yu SM. Periodontal disease and pregnancy outcomes: state-of-the-science. Obstet Gynecol Surv 2007;62:605–615.