1. www.jbg.org.ec/ingles/history.htm
2. Obstetrical and neonatal outcome in young adolescents of low socio-economic status: a case control study;Hidalgo;Arch. Obstet. Gynecol.,2004
3. Adequacy of prenatal care and pregnancy outcome;Krueger;J. Am. Osteopath. Assoc.,2000
4. Prenatal care utilization and foetal outcomes at Harare Maternity Hospital, Zimbabwe;Galvan;Cent. Afr. J. Med.,2001
5. The effectiveness of antenatal care in preventing intrauterine growth retardation and low birth weight due to preterm delivery;Coria-Soto;Int. J. Qual. Health Care,1996