Cookies on this website
We use cookies to ensure that we give you the best experience on our website. If you click 'Continue' we'll assume that you are happy to receive all cookies and you won't see this message again. Click 'Find out more' for information on how to change your cookie settings.

BackgroundThe pattern of change in maternal bone turnover throughout pregnancy is poorly characterized.ObjectiveWe investigated changes across pregnancy in a marker of maternal bone resorption, urinary C-terminal telopeptide of type I collagen (CTX), the influence of gestational vitamin D supplementation, and associations between CTX and maternal postnatal bone indices.DesignThe Maternal Vitamin D Osteoporosis Study (MAVIDOS) is a randomized, double-blind, placebo-controlled trial of 1000 IU/day cholecalciferol vs placebo from 14 weeks' gestation to birth. Maternal second void urinary α- and β-CTX were measured (Enzyme Linked Immunosorbent Assay, ELISA) at 14 and 34 weeks' gestation; DXA was performed within 2 weeks post-partum. Mann-Whitney rank sum, Spearman's rank correlation and linear regression were used to compare median CTX values within and between groups from early to late pregnancy, and associations with maternal bone outcomes.Results372 women had CTX and 25(OH)-vitamin D measured in early and late pregnancy. CTX at 14 and 34 weeks' gestation were correlated in both placebo (r = 0.31) and cholecalciferol (r = 0.45) groups (P ConclusionsMaternal urinary CTX, a bone resorption marker, rises through pregnancy, though to a lesser degree with gestational cholecalciferol supplementation, and is inversely associated with maternal bone mass post-partum.Clinical Trial Registry number and website: ISRCTN:82927713; EUDRACT:2007-001716-23.

Original publication

DOI

10.1093/ajcn/nqab264

Type

Conference paper

Publication Date

23/07/2021

Addresses

MRC Lifecourse Epidemiology Unit, University of Southampton, Southampton, UK.

Keywords

MAVIDOS Trial Group