Wood C, Larsen L, Williams R
Aust N Z J Obstet Gynaecol. 1979 Nov;19(4):216-9. doi: 10.1111/j.1479-828x.1979.tb01376.x.
Menstrual length was analysed in 2,342 women attending the Shepherd Foundation. Prolonged menses were more common in Australian and New Zealand born, in women with irregular, short or long menstrual cycles, menstrual pain, high parity, and an intrauterine device. In contrast to women with premenstrual tension and menstrual pain, psychological factors, smoking and drinking were not more common in women with increased menstrual length. It is concluded that somatic factors alone control menstrual length, and results in the present study support the hypotheses that both the hypothalamic-pituitary system and prostaglandins may be involved in this control. Evidence was found that the use of the contraceptive pill reduces the incidence of premenstrual tension when menstrual length is also reduced.
对2342名就诊于谢泼德基金会的女性的月经周期长度进行了分析。月经延长在出生于澳大利亚和新西兰的女性中更为常见，在月经周期不规律、短或长、有痛经、多产以及使用宫内节育器的女性中也更为常见。与经前紧张和痛经的女性相比，心理因素、吸烟和饮酒在月经周期延长的女性中并不更常见。得出的结论是，仅躯体因素控制月经周期长度，本研究结果支持下丘脑 - 垂体系统和前列腺素可能都参与此控制的假说。有证据表明，当月经周期长度也缩短时，使用避孕药可降低经前紧张的发生率。
