The influence of maternal cortisol and emotional state during pregnancy on fetal intrauterine growth.
BACKGROUND
This exploratory study investigates the influence of maternal cortisol and emotional state during pregnancy on fetal intrauterine growth (IUG). We expected higher basal cortisol levels, or more depressive and anxious complaints during pregnancy, to be associated with slower IUG and lower birth weight.


METHODS
A total of 91 pregnant women were recruited from the antenatal clinic and were seen once each trimester. In addition to psychological assessments, a diurnal cortisol profile was derived from saliva samples. IUG was evaluated using ultrasound.


RESULTS
In mid-pregnancy (trimester (T)2), basal cortisol levels significantly predicted the variance of weight (proportion of variance in growth variable explained (PVE) = 11.6%) and body mass index (BMI) at birth (PVE = 6.8%). In late pregnancy (T3) emotional state, particularly depressive symptoms (BMI at birth: PVE = 6.9%; ponderal index (PI) at birth: PVE = 8.2%; head circumference at T3: PVE = 10.3%; head circumference at birth PVE = 9.1%) and attachment (BMI at birth: PVE = 6.9%; PI at birth: PVE = 7.2%) had an influence on growth. Analysis of growth between T2 and T3 showed that attachment and cortisol in T3 had an influence on the variation in increase in estimated fetal weight (PVE = 12.5-8.6%).


CONCLUSIONS
These data indicate basal cortisol levels were more important in T2 whereas emotional state was more important in T3.
Department of Psychiatry, University Hospitals Leuven, Leuven, Belgium. titia.hompes@uz.kuleuven.be
Titia
T
Hompes
Elske
E
Vrieze
Steffen
S
Fieuws
Annelies
A
Simons
Liesbeth
L
Jaspers
Johan
J
Van Bussel
Ganel
G
Schops
Edith
E
Gellens
Rieta
R
Van Bree
Johan
J
Verhaeghe
Bernard
B
Spitz
Koen
K
Demyttenaere
Karel
K
Allegaert
Bea
B
Van den Bergh
Stephan
S
Claes
D000328:Adult; D004644:Emotions; D005260:Female; D047109:Fetal Development; D006801:Humans; D006854:Hydrocortisone / Q000097:blood*; D011247:Pregnancy
D006854:Hydrocortisone