1. 1. Manning FA, Hohler C. Intrauterine growth retardation: diagnosis, prognostication, and management based on ultrasound methods. In: Fleischer AC, et al., eds. The principles and practice of ultrasonography in obstetrics and gynecology. 4th ed. Norwalk, Conn.: Appleton & Lange, 1991:331-48.
2. Fetal redistribution of blood flow and amniotic fluid volume in growth retarded fetuses;Yoshimura;Early Hum Dev,1997
3. Cerebral umbilical Doppler ratio as a predictor of adverse perinatal outcome;Gramellini;Obstet Gynecol,1992
4. Recent advance in the use of doppler waveform indices in the antenatal assessment of intrauterine growth retardation;TC;Aust N Z J Obstet Gynaecol,1994
5. 5. Khurana A, Chawala J, Singh K. Normal systolic/ diastolic ratios of the umbilical artery flow velocity waveforms in Indian pregnancies. Indian J Radiol Imaging 1995; 5: 25-8.