叶酸在合成中起着重要的作用,修复,和脱氧核糖核酸(DNA)的甲基化。目前,大多数研究都集中在对胎儿发育的影响,目前仍缺乏以人群为基础的研究,探讨妊娠期使用FA与胎盘发育之间的关系。本研究旨在调查不同妊娠中补充FA对分娩时胎盘相关参数的影响。这项研究包括从马鞍山市招募的2708名孕妇,安徽省,中国,2013年5月至2014年9月。收集了从受孕到分娩前一个月的FA使用信息。胎盘长度,宽度,并测量厚度。多变量logistic回归分析用于评估不同妊娠中补充FA对胎盘相关参数的影响。基于多元回归分析,采用倾向评分加权,以增强不同FA补充组之间的可比性.与FA非用户相比,受孕前补充FA与胎盘宽度增加有关(0.241cm,95CI:0.052-0.429,p=0.013)和胎盘表面积增加(6.398cm2,95CI:1.407-11.389,p=0.012),妊娠早期/中期使用FA,分别,与胎盘厚度增加有关(0.061厘米,95CI:0.004-0.117,p=0.036;0.066厘米,95CI:0.004-0.129,p=0.038)。受孕前使用FA可以增加胎盘宽度和面积,妊娠早期/中期使用FA可增加胎盘厚度。为了确认调查结果,需要进一步调查。
Folic acid plays an important role in the synthesis, repair, and methylation of deoxyribonucleic acid (DNA). Currently, most studies have focused on the effects of periconceptional folic acid (FA) supplementation on fetal development, and there is still a lack of population-based research exploring the association between FA use during pregnancy and placental development. This study aimed to investigate the impacts of FA supplementation in different pregnancies on
placenta-related parameters at delivery. The study included 2708 pregnant women recruited from Ma\'anshan City, Anhui Province,
China, between May 2013 and September 2014. Information on FA use from one month before conception to delivery was collected. Placental length, width, and thickness were measured. Multivariable logistic regression analysis was used to assess the effects of FA supplementation in different pregnancies on
placenta-related parameters. Based on multiple regression analysis, propensity score weighting was adopted to enhance comparability between different FA supplementation groups. Compared with FA non-users, FA supplementation before conception was associated with increased placental width (0.241 cm, 95%CI: 0.052-0.429, p = 0.013) and increased placental surface area (6.398 cm2, 95%CI: 1.407-11.389, p = 0.012), and FA use in early/middle pregnancy was, respectively, related with increased placental thickness (0.061 cm, 95%CI: 0.004-0.117, p = 0.036; 0.066 cm, 95%CI: 0.004-0.129, p = 0.038). FA use before conception could increase placental width and area, and FA use in early/middle pregnancy could increase placental thickness. To confirm the findings, further investigations are needed.