Abstract：
This study investigated the differences in the thermal preferences of pregnant women during various trimesters and the factors influencing these preferences. The survey was conducted in a hospital waiting room, encompassing the testing of thermal environmental parameters, and the distribution of questionnaires to pregnant women. These questionnaires encompassed various aspects, including basic information, thermal responses, pregnancy diseases, and more. In total, 1388 questionnaires were collected, distributed across the first trimester (225 participants), second trimester (498 participants), and third trimester (665 participants). The findings revealed a notable shift in the thermal preferences of pregnant women as their pregnancies progressed, transitioning from a preference for warmer conditions to a preference for cooler environments. Specifically, the mean thermal preference scores for the first, second, and third trimesters were 0.82, -0.27, and -1.76, respectively. These shifting preferences were associated with various factors, including pregnancy diseases, pre-pregnancy body mass index (PBMI), and exercise habits. Notably, hyperthyroidism, a higher PBMI, and regular exercise were correlated with a preference for cooler conditions, whereas hypothyroidism, anemia, a lower PBMI, and rare exercise were associated with a preference for warmer environments. Furthermore, it was observed that the actual neutral temperatures for pregnant women in the first, second, and third trimesters were 20.3 °C, 19.5 °C, and 19 °C, respectively. By contrast, the predicted neutral temperatures were 23.5 °C for the first and third trimesters and 23.4 °C for the second trimester. This indicated that the Predicted Mean Vote (PMV) model tended to underestimate the acceptability that pregnant women experienced in colder environments. Given the unique thermal preferences of pregnant women, further research is essential to refine thermal comfort parameters and the PMV model tailored specifically to this demographic.
摘要：
本研究调查了不同孕期孕妇热偏好的差异以及影响这些偏好的因素。调查是在医院候诊室进行的,包括热环境参数的测试，以及向孕妇发放调查问卷。这些问卷涵盖了各个方面，包括基本信息，热响应，妊娠疾病,还有更多.总的来说,收集了1388份问卷，分布在孕早期(225名参与者)，孕中期（498名参与者），和妊娠晚期（665名参与者）。研究结果表明，随着孕妇怀孕的进行，孕妇的热偏好发生了显着变化，从对温暖条件的偏好转变为对凉爽环境的偏好。具体来说,第一个的平均热偏好分数，第二,妊娠晚期分别为0.82、-0.27和-1.76。这些转变的偏好与各种因素有关，包括妊娠疾病,孕前体重指数(PPMI),锻炼习惯。值得注意的是,甲状腺功能亢进,更高的PBMI，定期锻炼与对凉爽条件的偏好相关，而甲状腺功能减退，贫血,较低的PBMI，罕见的运动与对温暖环境的偏好有关。此外，据观察，孕妇的实际中性温度在第一，第二,妊娠晚期为20.3°C，19.5°C,19°C,分别。相比之下,预测的中性温度在前三个月和第三个三个月为23.5°C，在第二个三个月为23.4°C。这表明预测平均投票率（PMV）模型倾向于低估孕妇在较冷环境中的可接受性。鉴于孕妇独特的热偏好，进一步的研究对于完善热舒适参数和专门针对该人群量身定制的PMV模型至关重要。
