Serum 25-hydroxyvitamin D levels throughout pregnancy: a longitudinal study in healthy and preeclamptic pregnant women

• Main Authors: Yessica Agudelo-Zapata, Luis Miguel Maldonado-Acosta, Héctor Fabio Sandoval-Alzate, Natalia Elvira Poveda, María Fernanda Garcés, Jonathan Alexander Cortés-Vásquez, Andrés Felipe Linares-Vaca, Carlos Alejandro Mancera-Rodríguez, Shahar Alexandra Perea-Ariza, Karen Yuliana Ramírez-Iriarte, Camilo Andrés Castro-Saldarriaga, Juan Manuel Arteaga-Diaz, Roberto Franco-Vega, Edith Ángel–Müller, Arturo José Parada-Baños, Jorge E Caminos
• Format: Article
• Language: English
• Published: Bioscientifica 2018-05-01
• Series: Endocrine Connections
• Subjects: 25 hydroxyvitamin D; pregnancy; preeclampsia; menstrual cycle
• Online Access: http://www.endocrineconnections.com/content/7/5/698.full
• ISSN: 2049-3614; 2049-3614

Background: Worldwide there is a high prevalence of 25-hydroxyvitamin D (25OHD) deficiency and has been associated with adverse outcomes during pregnancy. Objective: This is a nested, case–control study in a longitudinal cohort to compare the serum 25OHD levels and other biomarkers throughout pregnancy in a group of 20 preeclamptic women and 61 healthy pregnant women. An additional group of 29 healthy non-pregnant women were also studied during the two phases of the menstrual cycle. Results: Mean 25OHD levels in non-pregnant women were 31.9 ng/mL and 34.9 ng/mL during follicular and luteal phase, respectively (P < 0.01). Mean serum 25OHD levels in healthy pregnant women were 26.5, 30.1 and 31.9 ng/mL, at first, second and third trimester, respectively (P < 0.001). The first trimester levels of 25OHD were lower than those of healthy non-pregnant women (P < 0.001), showing a significant recovery at third trimester. In the group of healthy pregnant women, the 25OHD levels were 25.7 ng/mL and 27.2 ng/mL at 3 and 6 months postpartum, respectively; both values were lower than those observed in the non-pregnant women (P < 0.001). In preeclamptic women, 25OHD serum levels were similar to those of healthy pregnant women; nevertheless, they remained almost unchanged throughout pregnancy. Conclusion: There were no significant differences between healthy and preeclamptic pregnant women in terms of 25OHD levels throughout the pregnancy. Serum 25OHD levels in non-pregnant women were higher during luteal phase compared with follicular phase. The 25OHD levels of non-pregnant women tended to be higher than those of pregnant women.