Vähä-Eskeli K, Erkkola R, Seppänen A
Department of Obstetrics and Gynecology, University of Turku, Finland.
Eur J Obstet Gynecol Reprod Biol. 1991 May 10;39(3):169-74. doi: 10.1016/0028-2243(91)90053-n.
The effect of short-term heat stress on rectal and skin temperatures was measured in three groups: group I consisted of 15 non-pregnant, healthy women; group II of 23 women 13-14 weeks pregnant; and group III of 23 women 36-37 weeks pregnant. Rectal and skin temperatures were recorded every 5 min during a resting period (20 min, 21-23 degrees C) followed by thermal stress (20 min, 70 degrees C) and a recovery period (45 min, 21-23 degrees C). The rectal temperature decreased significantly in each group at the beginning of the stress. The total increase from pre-stress levels to the end of the heat stress was from 37.1 to 37.5 degrees C in group I, 37.2 to 37.6 degrees C in group II and 37.0 to 37.3 degrees C in group III (P less than 0.05). During the recovery period, the rectal temperature was significantly lower in the late-pregnancy group as compared to non-pregnant subjects. The skin temperature increased from the resting period to the end of the stress from 34.0 to 39.1 degrees C in group I, from 33.7 to 39.3 degrees C in group II and from 33.5 to 39.0 degrees C in group III (P less than 0.001). During the recovery period, the skin temperature declined significantly faster, and to lower levels in the late-pregnancy group as compared to both other groups. We conclude that the heat-dissipating ability is slightly enhanced during late pregnancy.
第一组由15名未怀孕的健康女性组成；第二组由23名怀孕13 - 14周的女性组成；第三组由23名怀孕36 - 37周的女性组成。在静息期（20分钟，21 - 23摄氏度）、热应激期（20分钟，70摄氏度）和恢复期（45分钟，21 - 23摄氏度）期间，每隔5分钟记录一次直肠温度和皮肤温度。在应激开始时，每组的直肠温度均显著下降。从应激前水平到热应激结束时，第一组的总体升高幅度为37.1至37.5摄氏度，第二组为37.2至37.6摄氏度，第三组为37.0至37.3摄氏度（P < 0.05）。在恢复期，与未怀孕的受试者相比，妊娠晚期组的直肠温度显著更低。皮肤温度从静息期到应激结束时，第一组从34.0升高至39.1摄氏度，第二组从33.7升高至39.3摄氏度，第三组从33.5升高至39.0摄氏度（P < 0.001）。在恢复期，与其他两组相比，妊娠晚期组的皮肤温度下降得明显更快，且降至更低水平。我们得出结论，妊娠晚期散热能力略有增强。
