Pre-eclampsia is a major contributor to pregnancy-associated morbidity and mortality and the management of this complex syndrome needs to be improved. Recently serum collectrin has emerged as a new member of the renin-angiotensin system that regulates the blood pressure through nitric oxide -endothelial nitric oxide synthase pathway.

To evaluate the correlation of serum collectrin level and preeclampsia onset.

A prospective case control study.

Ninety pregnant women attended the outpatient clinic Al-Yarmook Teaching Hospital in Baghdad / Iraq along the period from April 2018 until December 2018 had been divided into three groups. Group A included 30 pregnant women presented with early onset pre-eclampsia (before 34 weeks of gestation), group B included 30 pregnant women presented with late onset pre-eclampsia (at or after 34 weeks of gestation) and group C included 30 apparently healthy term pregnant women. Serum collectrin levels were measured for each pregnant woman by using enzyme-linked immunosorbent assay analyzer.

The mean serum collectrin was the lowest in pregnant women with early onset pre-eclampsia (61.65 ± 3.62 pg/ml) while it was (82.61 ± 6.41 pg/ml) for pregnant women with late onset pre-eclampsia and (101.11 ± 8.27 pg/ml) for healthy term pregnant women. These differences were found to be significant (p value = 0.001). This significant decrement was inversely correlated with the systolic blood pressure (r = -0.565, p-value = 0.001) and diastolic blood pressure and (r = -0.748, p-value = 0.001).

Serum collectrin levels had a significant role in controlling the blood pressure in pregnant women with a significant inverse correlation between serum collectrin concentrations and blood pressure.