Cappadona, RosariaPuzzarini, SaraFarinelli, VanessaIannone, PiergiorgioDe Giorgi, AlfredoDi Simone, EmanueleManfredini, RobertoVerteramo, RositaGreco, PantaleoRodriguez Borrego, Maria AuroraFabbian, FabioLopez Soto, Pablo Jesus2023-02-092023-02-092020-10-25Cappadona R, Puzzarini S, Farinelli V, Iannone P, De Giorgi A, Di Simone E, et al. Daylight Saving Time and Spontaneous Deliveries: A Case-Control Study in Italy. Int J Environ Res Public Health. 2020 Nov 3;17(21):8091http://hdl.handle.net/10668/16553Background: Although the current literature shows that daylight saving time (DST) may play a role in human health and behavior, this topic has been poorly investigated with reference to Obstetrics. The aim of this case-control study was to evaluate whether DST may influence the number of spontaneous deliveries. (2) Methods: A low-risk pregnancy cohort with spontaneous onset of labor (n = 7415) was analyzed from a single Italian region for the period 2016-2018. Primary outcome was the number of spontaneous deliveries. Secondary outcomes were: gestational age at delivery, type and time of delivery, use of analgesia, birth weight, and 5-min Apgar at delivery. We compared the outcomes in the two weeks after DST (cases) to the two weeks before DST (controls). (3) Results: Data showed no significant difference between the number of deliveries occurring before and after DST (Chi-square = 0.546, p = 0.46). Vaginal deliveries at any gestational age showed no statistical difference between the two groups (Chi-square = 0.120, p = 0.73). There were no significant differences in the secondary outcomes, as well. (4) Conclusions: DST has neither a significant impact on the number of deliveries nor on the obstetric variables investigated by this study.enAttribution 4.0 Internationalhttp://creativecommons.org/licenses/by/4.0/ChronobiologyCircadian rhythmDaylight saving time (DST)DesynchronizationMidwiferyNursingObstetricsSpontaneous deliveryCase-control studiesDelivery, obstetricFemaleGestational ageHumansItalyLabor, obstetricPregnancyRetrospective studiesTime factorsresearch article33153052open accessEdad gestacionalEmbarazoEstudios retrospectivosFactores de tiempoParto obstétricoTrabajo de parto10.3390/ijerph172180911660-4601PMC7662372https://www.mdpi.com/1660-4601/17/21/8091/pdf?version=1604393988https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7662372/pdf