Lipoproteine A in normal pregnancy – A preliminary report from the CRIBS study

Concentration of lipoprotein (a), Lp(a), an important part of the clinical biomarker profile for atherosclerosis, in blood plasma varies both between and among populations. The elevated Lp(a) level in pregnancy were recognized as a risk factor for thrombosis and/or pre-eclampsia, but the referent values for uneventful pregnancies are yet undefined. The objective of this study was to test the association of fasting Lp(a) levels, taken between 22nd and 26th week of gestation, with possible predisposing factors (older age, smoking status, physical inactivity, hypertension, gestational diabetes), pregnancy outcomes (preterm birth, small/normal/large for gestational age) and newborns` anthropometric measures in 113 women (age range 19.8-41.7 yrs, mean 30.6±4.6 yrs) from the CRoatian Islands` Birth Cohort Study (CRIBS). In these women, with no history of chronic disease prior to pregnancy, Lp(a) leves varied largely, from 1.0 mg/dl to 127.3 mg/dl (median 13.1 mg/dl), but most of the women (88.5%) had Lp(a) 35 yrs), smoking statuts (both current and ex-smokers) and hypertension in predicting Lp(a)≥50 mg/dL (p=0.017, Cox & Snell R2=0.162, Nagelkerke R2=0.333). Nor logistic, neither linear regression models used for the estimation of adjusted associations between Lp(a) and birth weight, length and head circumference, all z- standardized according to WHO, showed significant associations. In the CRIBS sample, elevated Lp(a) levels were not found to be a predictive biomarker for the pregnancy outcome and neonatal size.