Cord Blood Sex Hormones Concentration: Relation to Birth Weight and Pregnancy Complications


  • Hanan L. Al-Omary Physiology Department, College of Medicine, University of Baghdad, Baghdad, Iraq.
  • Zainab M. Alawad Physiology Department, College of Medicine, University of Baghdad, Baghdad, Iraq.



cord blood, Pregnancy, birth weight, estradiol, testosterone


Objectives: Umbilical cord blood can be taken at birth and largely gives indication of fetal and maternal conditions. The aim of the study was to investigate the relation between sex hormones in cord blood and birth weight of newborns and pregnancy complications.

Materials and methods: Fifty cord blood samples were collected from newborns at labor room of Baghdad Teaching Hospital between May and October 2018. Blood was withdrawn from their mothers for lead analysis. Five milliliters (ml) of cord blood was taken, 3 ml was used for testosterone and estradiol analysis (using enzyme-linked immunosorbent assay) and 2 ml for lead measurement by lead care analyzer. Newborns weight and head circumference were measured. Delivered women were divided into 4 groups: Women with normal pregnancy, women with preeclampsia, diabetic women and polycystic ovary syndrome (PCOS) women.

Results: There was no significant difference in age between women in all groups (p˃0.05). Birth weights, estradiol, and testosterone were significantly different between groups. Estradiol was higher in cord blood of newborns of PCOS women (pË‚0.05) than others. Testosterone was higher in cord blood of babies of PCOS and preeclampsia women compared to those of diabetes (pË‚0.05). There were no significant differences between male and female neonates regarding cord estradiol (3596.27±1934.69, 3714.57±1581.47 pg/ml respectively), and testosterone (393.18±87.14, 361.43±102.14 ng/ml respectively) (p˃0.05). Maternal lead levels correlated positively with cord lead (r=0.905, pË‚0.05), which correlated negatively with head circumference (r=-0.766, pË‚0.05). Birth weight correlated negatively with estradiol (r=-0.295), but positively with testosterone (r=0.006) (p˃0.05). 

Conclusion: Cord blood estradiol and testosterone levels do not differ between males and females. Estradiol was high in cord blood of PCOS mothers. Testosterone was high in cord blood of PCOS and preeclampsia mothers. The increase in cord lead causes decrease in babies head circumference. 


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How to Cite

Al-Omary, H. L., & Alawad, Z. M. (2019). Cord Blood Sex Hormones Concentration: Relation to Birth Weight and Pregnancy Complications. Journal of Contemporary Medical Sciences, 5(2), 106–111.