Harbert G M, Coiner I M, Turner S M, Atuk N O
J Reprod Med. 1981 Sep;26(9):493-8.
Uterine activity was monitored continuously for periods of three or five days in two subjects. Biorhythms in the spontaneous variations of intrauterine pressure and frequency of contraction were demonstrated in both phases of the menstrual cycle. Statistically, the patterns conformed to 24-hour Fourier curves, with higher values synchronized by the periods of light. Positive statistical correlations were present between uterine activity and the circadian patterns of intrauterine temperature and norepinephrine concentrations in both urine and peripheral arterial plasma.
在两名受试者中，连续三到五天对子宫活动进行监测。在月经周期的两个阶段均显示出子宫内压力和收缩频率自发变化的生物节律。从统计学上讲，这些模式符合24小时傅里叶曲线，较高的值在光照期间同步。子宫活动与子宫内温度以及尿液和外周动脉血浆中去甲肾上腺素浓度的昼夜节律模式之间存在正相关。
