Abstract: Background:Under regular epidemic prevention and control, three major trends of aging, fewer children, and non-marriage in China are accelerating. On June 26, 2021, the CPC Central Committee and State Council released Decisions on Optimizing the Childbearing Policy to Promote Long-term Balanced Development of Population, implementing the policy that a couple can have three children and introducingpositive childbearing support measures. Establishing an outdoor environment that facilitates physiological and travel safety of pregnant women, alleviates pressure, and helps them acquire resources has potentiallypositive influences on theirfeelings and health outcomes. Objective: This study reviewed the influence of outdoor environmental supports on thehealth of pregnant women. Through literature review, the environmental factors that influence pregnant women's health as well as their basic paths of influence were proposed. By combiningtherelationship between pregnant women's health and environmental factors withthe pressure recovery theory agreeing with the "environmental role" of pregnant women, apossible overall action mechanism modelwas proposed to guide design practices. An evaluation system was alsoestablished to provide a basis for research. Methods: Based on literature review, the Web of Science core database and CNKI Chinese database were selectedand a global analysis was carried out by using CiteSpace's literature biliometric analysis. The hierarchical strategies and flow chart of literature evaluation studies which were summarized by Jiang systematically in 2020 were applied to organize relevant studies in six layers. Evaluating the influence of specific environmental factors on the health outcomes of pregnant women is based on reliable, credible, and valid data. Subsequently, 13 studies were reviewed comprehensively and three health outcome influences were determined: 1) physiological safety of pregnant women, 2) psychological stress of pregnant women, and 3) social supports to pregnant women. These three types cover physiological influences, psychological influences, and social influences. Results:The study results cover three points from the perspective of research trends. (1) Neighborhood environment, residential/community environment, and built environment are major environmental objects in current studies. (2) Environmental factors, such as air pollution, walkability, and greenland exposurecan alldirectlyinfluence the physiological and travel safety of pregnant women. (3) Environmental factors can also influence the health of pregnant women indirectly through physical activities and potential psychological stress, such as physical environmental barriers, environmental uncivilized behaviors, social supports, distance to entertainment facilities, acquisition of healthy foods, and so on. Conclusions: This study found that due to physiological barriers like poor health and physical pains or quick changes in social environment, pregnant women have high requirements forrecovery from living environmental pressure. They have a property of "environmental roles' in common with the "supportive design theory (SDT)" research of Roger S.Ulrich. Furthermore, this study proposed the possible overall action mechanism model forenvironmental factors’ influence on the health of pregnant women by combining SDT and "stimuli-cognition-reaction" theory. Thisemphasizes the function of the outdoor environment in promoting the health of pregnant women. Finally, the table of outdoor supportive environmental factors that influence health of pregnant women was summarized. Limitations: This study did notconduct a systematic evaluation ora factor analysis of influences of various environmental factors on health of pregnant women. The proposed overall action mechanism model must still be verified and refined.

Key words: supportive environment, pregnant women, healthy environment, influencing factors, health benefits 

摘要： 随着人口结构调整和三胎政策的出台，社会高龄孕产妇比例将扩大，建立促进孕妇生理与出行安全，促进孕妇压力缓解和促进孕妇资源获取的户外环境，将对孕妇主体感受和健康结果有潜在的积极影响。以梳理国内外研究影响孕妇健康的户外环境支持性影响因素为目的，通过梳理国内外研究中户外环境影响孕妇健康结果的证据，发现当前研究主要环境对象为邻里环境和社区环境。环境直接影响因素中的空气污染、可步行性和绿地暴露等会影响孕妇生理和出行安全。环境间接影响因素如物理环境障碍、环境不文明行为、社会支持、娱乐设施距离、健康食物获取等将影响孕妇体力活动和心理压力，并最终影响孕妇健康。根据文献分析结果，进一步结合支持性设计理论和“刺激-认知-反应”理论，提出孕妇健康同环境要素之间可能的总体作用机制模型，以期为指导设计实践，进一步建立评价体系提供研究基础。

关键词: 支持性环境, 孕妇, 健康环境, 影响因素, 健康效益