Çobanoğlu Asuman, Şendir Merdiye
Nursing Department, Health Sciences Faculty, Giresun University, Piraziz, Turkey.
Nursing Department, Nursing Faculty, University of Health Sciences, İstanbul, Turkey.
J Obstet Gynaecol. 2020 Feb;40(2):182-187. doi: 10.1080/01443615.2019.1606182. Epub 2019 Jul 24.
The aim of this study was to investigate whether natural birth has a circadian rhythm. The present study was planned as a retrospective descriptive study of the natural births performed in a Maternity and Children's Diseases Training and Research Hospital in the north of Turkey between January 1 and December 31. The study included 723 (98.9%) cases of natural birth. It was found that the mean age of the women in the study sample was 26.84 ± 5.83 years and the mean gestational age was 38.98 ± 1.95 years. It was determined that the mean labour duration of the women was 12.47 ± 0.78 hours; of all births, 34.6% occurred between 08:00-16:00 hours, 38.2% occurred between 16:01-00:00 hours and 27.2% occurred between 00:01-07:59 hours. Considering the birth time in terms of month, it was observed that the most common birth month was July and the least common birth month was March. In accordance with the study data, it is observed that the labour process occurred at night in the day/night cycle and in the summer months at a higher rate.Impact statement Chronological transitions are of critical importance for pregnancy. There are many mechanisms affecting Labour process. One of the most important mechanisms among these is the release and timing of foetal-maternal hormones. The chronological transitions are critical for a normal pregnancy and any temporary alteration may have detrimental effects for foetal development and/or maternal health It is observed that births occur at a higher rate at night hours in the day-night cycle and in summer months, and in terms of day, Wednesday is the most common birth day. Considering these results, although it is thought that the levels of hormones released at night lead the birth to occur mostly at night-time hours and non-fully developed thermoregulatory system and sympathetic nervous systems of foetus and sensitivity to temperature may be effective on the number of births in summer months, it is seen that the data are insufficient to reach this conclusion. It is believed that the foetus has a biological clock. This is parallel to fluctuating levels of various hormones affecting labour and delivery, which may be a positive influence on the labour process itself. It seems that more study results are required in addition to these results.
本研究的目的是调查自然分娩是否存在昼夜节律。本研究计划对土耳其北部一家妇幼疾病培训与研究医院在1月1日至12月31日期间进行的自然分娩进行回顾性描述性研究。该研究纳入了723例（98.9%）自然分娩病例。研究样本中女性的平均年龄为26.84±5.83岁，平均孕周为38.98±1.95岁。确定女性的平均产程为12.47±0.78小时；在所有分娩中，34.6%发生在08:00 - 16:00时之间，38.2%发生在16:01 - 00:00时之间，27.2%发生在00:01 - 07:59时之间。从月份角度考虑分娩时间，观察到最常见的分娩月份是7月，最不常见的分娩月份是3月。根据研究数据，观察到分娩过程在昼夜周期中的夜间以及夏季月份发生率更高。影响声明时间顺序的转变对妊娠至关重要。有许多机制影响分娩过程。其中最重要的机制之一是胎儿 - 母体激素的释放和时间。时间顺序的转变对正常妊娠至关重要，任何暂时的改变都可能对胎儿发育和/或母体健康产生不利影响。观察到在昼夜周期中的夜间以及夏季月份分娩发生率更高，就日期而言，周三是最常见的分娩日。考虑到这些结果，尽管认为夜间释放的激素水平导致分娩大多发生在夜间，并且胎儿未完全发育的体温调节系统和交感神经系统以及对温度的敏感性可能对夏季月份的分娩数量有影响，但可见数据不足以得出这一结论。据信胎儿有生物钟。这与影响分娩和分娩的各种激素水平波动平行，这可能对分娩过程本身有积极影响。除了这些结果外，似乎还需要更多的研究结果。
