Jouppila R, Jouppila P, Moilanen K, Pakarinen A
Br J Obstet Gynaecol. 1980 Mar;87(3):234-8. doi: 10.1111/j.1471-0528.1980.tb04526.x.
Maternal plasma prolactin (PRL) concentrations were determined during the course of induced labours in 18 normal parturients. Every second mother was given segmental epidural analgesia for pain relief during the first stage of labour and the remaining parturients served as controls. The maternal PRL level declined during labour in both groups, which contrasts with the increased output seen in nonpregnant patients subjected to stress. The lowest levels were reached during the first stage of labour. The reduction in PRL levels was statistically significant in the control group but not in the epidural group of patients.
在18名正常产妇引产过程中测定母体血浆催乳素（PRL）浓度。每隔一位产妇在第一产程中接受节段性硬膜外镇痛以缓解疼痛，其余产妇作为对照。两组产妇在分娩过程中母体PRL水平均下降，这与应激状态下非妊娠患者PRL分泌增加形成对比。在第一产程中达到最低水平。对照组PRL水平的降低具有统计学意义，而硬膜外组患者则无统计学意义。
