Umbilical cord insertion and timing of delivery: 3 measures of relative umbilical cord insertion account for 29% of gestational age variance
American Journal of Obstetrics and Gynecology. 2003;189(6):S155 
Arterial umbilical cord PH, gestational age, and nucleated red blood cell count
American Journal of Obstetrics and Gynecology. 1995;172(1):320
Maternal and Umbilical Cord Serum Leptin Concentrations in Small-for-Gestational-Age and in Appropriate-for-Gestational-Age Neonates: A Maternal, Fetal, or Placental Contribution?
Neonatology. 2003;84(1):67-72
Predictiveness of antenatal umbilical artery Doppler for adverse pregnancy outcome in small-for-gestational-age babies according to customised birthweight centiles: population-based study
BJOG: An International Journal of Obstetrics & Gynaecology. 2008;115(5):590-594
Prenatal diagnosis of a lean umbilical cord: a simple marker for the fetus at risk of being small for gestational age at birth
Ultrasound in Obstetrics and Gynecology. 1999;13(3):176-180
Gestational age reference ranges for umbilical cord blood lactate: An external validation study of post‐date pregnancies
Acta Obstetricia et Gynecologica Scandinavica. 2020;99(11):1430-1433
Changes in the Prevalence of Embryologic Remnants in Umbilical Cord With Gestational Age
Pediatric and Developmental Pathology. 2018;22(4):288-291
Fetal Aneuploidy and Umbilical Cord Thickness Measured Between 14 and 23 Weeks' Gestational Age
Journal of Ultrasound in Medicine. 2004;23(9):1177-1183
Physiological development of a mixed metabolic and respiratory umbilical cord blood acidemia with advancing gestational age
Early Human Development. 2006;82(9):583-589
Levels of soluble endothelial selectin in umbilical cord serum are influenced by gestational age and histological chorioamnionitis, but not by pre-eclampsia
Journal of Obstetrics and Gynaecology Research. 2011;37(12):1818-1823