why choose us

300×250 Ad Slot

Research Article: Neonatal reference intervals for salivary steroids: focus on prematurity, stressful events and perinatal betamethasone

Date Published: 2026-06-16

Abstract:
Painlessly obtained samples can improve diagnostics and care in paediatric conditions with affected steroidogenesis. To establish neonatal reference intervals (RIs) and identify sources of biological variation for steroid hormones in saliva. Steroid concentrations were determined using LC-MS/MS in 412 saliva samples from 174 infants aged 0-4 weeks, born at gestational age 26–42 weeks, recruited from three neonatal intensive care units and one maternity ward. We used six approaches to construct RIs with partitioning based on results from linear mixed models. RIs in nmol/L calculated with robust method using median of up to six samples with sufficient volume from each infant were for salivary 17OH-pregnenolone:?<4.0; 17OH-progesterone:?<2.5; 11-deoxycortisol: 0.02–0.99; 21-deoxycortisol: <0.2; cortisol: 0.65–39; cortisone: 18–154; deoxycorticosterone:?<0.04; corticosterone:?<0.76; aldosterone: 0.21–4.2; dehydroepiandrosterone:?<2.4; dehydroepiandrosterone sulphate:?<100; androstenedione:?<1.5; testosterone girls:?<0.10; testosterone boys:?<0.32. Following multivariable adjustment, prematurity was associated with elevated concentrations of mineralocorticoids, androgens and glucocorticoid-precursors (up to 240%, 500% and 1060% respectively), but not cortisol or cortisone. Being on respiratory support was linked with qualitative and quantitative changes in all corticosteroid pathways, while sampling during the first 48?h of life was associated with an increase in adrenocorticotropin-regulated glucocorticoids and androgens (except dehydroepiandrosterone) but not mineralocorticoids. Perinatal exposure to synthetic glucocorticoids led to 33% reduction in salivary cortisol, but not other hormones. Betamethasone was detectable in infants' saliva up to 12 days following maternal administration. We present neonatal reference intervals for steroid hormones in saliva thereby supporting a non-invasive and painless option for obtaining a steroid hormone profile in this fragile population.

Introduction:
Diagnostic approaches to aberrations in steroidogenic pathways ( Figure 1 ) often require simultaneous assessment of several hormones and their precursors. Relative overabundances of upstream to downstream metabolites point to enzymatic defects that manifest biochemically with characteristic signatures or patterns. Because production of some but not all adrenal hormones is increased in stress and anxiety, these conditions can change steroid profile both qualitatively and quantitatively. Sample matrices obtained by…

Read more

300×250 Ad Slot