Acknowledgement
The authors would like to express their appreciation for the pregnant women who took part in this study.
References
- Manuck TA, Rice MM, Bailit JL, Grobman WA, Reddy UM, Wapner RJ, et al. Preterm neonatal morbidity and mortality by gestational age: a contemporary cohort. Am J Obstet Gynecol 2016;215(1):103.e1-103.e14. https://doi.org/10.1016/j.ajog.2016.01.004
- Purisch SE, Gyamfi-Bannerman C. Epidemiology of preterm birth. Semin Perinatol 2017;41(7):387-391. https://doi.org/10.1053/j.semperi.2017.07.009
- Martin JA, Hamilton BE, Osterman MJ, Driscoll AK, Drake P. Births: final data for 2017. Natl Vital Stat Rep 2018;67(8):1-50.
- World Health Organization. Born too soon: the global action report on preterm birth; 2012 [cited 2020 Jul 1]. Available from: https://www.who.int/pmnch/media/news/2012/201204_borntoosoon-report.pdf.
- Beck S, Wojdyla D, Say L, Betran AP, Merialdi M, Requejo JH, et al. The worldwide incidence of preterm birth: a systematic review of maternal mortality and morbidity. Bull World Health Organ 2010;88(1):31-38. https://doi.org/10.2471/BLT.08.062554
- Sharifi N, Khazaeian S, Pakzad R, Fathnezhad Kazemi A, Chehreh H. Investigating the prevalence of preterm birth in Iranian population: a systematic review and meta-analysis. J Caring Sci 2017;6(4):371-380. https://doi.org/10.15171/jcs.2017.035
- de Freitas AS, Dobbler PC, Mai V, Procianoy RS, Silveira RC, Corso AL, et al. Defining microbial biomarkers for risk of preterm labor. Braz J Microbiol 2020;51:151-159. https://doi.org/10.1007/s42770-019-00118-x
- Tellapragada C, Eshwara VK, Bhat P, Acharya S, Kamath A, Bhat S, et al. Risk factors for preterm birth and low birth weight among pregnant Indian women: a hospital-based prospective study. J Prev Med Public Health 2016;49(3):165-175. https://doi.org/10.3961/jpmph.16.022
- Leal MD, Esteves-Pereira AP, Nakamura-Pereira M, Torres JA, Theme-Filha M, Domingues RM, et al. Prevalence and risk factors related to preterm birth in Brazil. Reprod Health 2016;13(Suppl 3):127. https://doi.org/10.1186/s12978-016-0230-0
- Shoja M, Shoja E, Gharaei M. Prevalence and affecting factors on preterm birth in pregnant women referred to Bentolhoda hospital-Bojnurd. J North Khorasan Univ Med Sci 2015;7(4):855-863 (Persian).
- Mehraban Z, Alizadeh L, Sadeghniyat HK. Surveying the relationship between sleep apnea and preterm birth in women referring to health centers of Ardabil. Urmia Med J 2016:26(11):931-940 (Persian).
- Gupta R, Dhyani M, Kendzerska T, Pandi-Perumal SR, BaHammam AS, Srivanitchapoom P, et al. Restless legs syndrome and pregnancy: prevalence, possible pathophysiological mechanisms and treatment. Acta Neurol Scand 2016;133(5):320-329. https://doi.org/10.1111/ane.12520
- Kocsis I, Szilagyi T, Turos J, Bako A, Frigy A. Effect of a gymnastics program on sleep characteristics in pregnant women. Taiwan J Obstet Gynecol 2017;56(2):204-209. https://doi.org/10.1016/j.tjog.2017.02.001
- Meharaban Z, Yahya S, Sadegniiat K. Restless legs syndrome during pregnancy and preterm birth in women referred to health centers of Ardabil. Iran Red Crescent Med J 2015;17(12):e24438. https://doi.org/10.5812/ircmj.24438
- Hung HM, Ko SH, Chen CH. The association between prenatal sleep quality and obstetric outcome. J Nurs Res 2014;22(3):147-154. https://doi.org/10.1097/jnr.0000000000000039
- Hutchison BL, Stone PR, McCowan LM, Stewart AW, Thompson JM, Mitchell EA. A postal survey of maternal sleep in late pregnancy. BMC Pregnancy Childbirth 2012;12:144. https://doi.org/10.1186/1471-2393-12-144
- Mindell JA, Cook RA, Nikolovski J. Sleep patterns and sleep disturbances across pregnancy. Sleep Med 2015;16(4):483-488. https://doi.org/10.1016/j.sleep.2014.12.006
- Abdullahzadeh M, Naji SA. The effect of matricaria chamomilla on sleep quality of elderly people admitted to nursing homes. Iran J Nurs 2014;27(89):69-79 (Persian). https://doi.org/10.29252/ijn.27.89.69
- Ram S, Seirawan H, Kumar SK, Clark GT. Prevalence and impact of sleep disorders and sleep habits in the United States. Sleep Breath 2010;14(1):63-70. https://doi.org/10.1007/s11325-009-0281-3
- Zhang J, Li F, Lin Y, Sheng Q, Yu X, Zhang X. Subjective sleep quality in perimenopausal women and its related factors. J Nanjing Med Univ 2007;21(2):116-119. https://doi.org/10.1016/S1007-4376(07)60028-8
- Nodine PM, Matthews EE. Common sleep disorders: management strategies and pregnancy outcomes. J Midwifery Womens Health 2013;58(4):368-377. https://doi.org/10.1111/jmwh.12004
- Chang JJ, Pien GW, Duntley SP, Macones GA. Sleep deprivation during pregnancy and maternal and fetal outcomes: is there a relationship? Sleep Med Rev 2010;14(2):107-114. https://doi.org/10.1016/j.smrv.2009.05.001
- Gunduz S, Kosger H, Aldemir S, Akcal B, Tevrizci H, Hizli D, et al. Sleep deprivation in the last trimester of pregnancy and inadequate vitamin D: is there a relationship? J Chin Med Assoc 2016;79(1):34-38. https://doi.org/10.1016/j.jcma.2015.06.017
- Malekzadegan A, Moradkhani M, Ashayeri H, Haghani H. Effect of relaxation on insomnia during third trimester among pregnant women. Iran J Nurs 2010;23(64):52-58 (Persian).
- Najar S, Sharafi F, Afshari P, Haghighizadeh MH. The relationship between sleep disorders during pregnancy and premature labor and low birth weight. Iran J Obstet Gynecol Infertil 2017;20(7):44-49 (Persian).
- Felder JN, Baer RJ, Rand L, Jelliffe-Pawlowski LL, Prather AA. Sleep disorder diagnosis during pregnancy and risk of preterm birth. Obstet Gynecol 2017;130(3):573-581. https://doi.org/10.1097/aog.0000000000002132
- Li R, Zhang J, Zhou R, Liu J, Dai Z, Liu D, et al. Sleep disturbances during pregnancy are associated with cesarean delivery and preterm birth. J Matern Fetal Neonatal Med 2017;30(6):733-738. https://doi.org/10.1080/14767058.2016.1183637
- Ota H, Hasegawa J, Sekizawa A. Effect of sleep disorders on threatened premature delivery. J Perinat Med 2017;45(1):57-61. https://doi.org/10.1515/jpm-2015-0149
- Dolatian M, Mehraban Z, Sadeghniat K. The effect of impaired sleep on preterm labour. West Indian Med J 2014;63(1):62-67.
- Tomfohr-Madsen L, Cameron EE, Dunkel Schetter C, Campbell T, O'Beirne M, Letourneau N, et al. Pregnancy anxiety and preterm birth: the moderating role of sleep. Health Psychol 2019;38(11):1025-1035. https://doi.org/10.1037/hea0000792
- Seyedahmadinejad FS, Golmakani N, Asgharipour N, Shakeri MT. Investigation of sleep quality during the third trimester of pregnancy and some related factors in primigravida women referred to health care centers in Mashhad-2014. Avicenna J Nurs Midwifery Care 2014;22(4):53-60 (Persian).
- Afkham Ebrahimi A, Bandi G, Salehi M, Tafti K, Vakili Y, Farsi A. Sleep parameters and the factors affecting the quality of sleep in patients attending selected clinics of Rasoul-e-Akram hospital. Razi J Med Sci 2008;15:31-38 (Persian).
- Okun ML, Luther JF, Wisniewski SR, Wisner KL. Disturbed sleep and inflammatory cytokines in depressed and nondepressed pregnant women: an exploratory analysis of pregnancy outcomes. Psychosom Med 2013;75(7):670-681. https://doi.org/10.1097/psy.0b013e31829cc3e7
- Sedov ID, Cameron EE, Madigan S, Tomfohr-Madsen LM. Sleep quality during pregnancy: a meta-analysis. Sleep Med Rev 2018;38:168-176. https://doi.org/10.1016/j.smrv.2017.06.005
- Loube DI, Poceta JS, Morales MC, Peacock MD, Mitler MM. Selfreported snoring in pregnancy. Association with fetal outcome. Chest 1996;109(4):885-889. https://doi.org/10.1378/chest.109.4.885
- Beebe KR, Lee KA. Sleep disturbance in late pregnancy and early labor. J Perinat Neonatal Nurs 2007;21(2):103-108. https://doi.org/10.1097/01.JPN.0000270626.66369.26
- Tsai SY, Kuo LT, Lee CN, Lee YL, Landis CA. Reduced sleep duration and daytime naps in pregnant women in Taiwan. Nurs Res 2013;62(2):99-105. https://doi.org/10.1097/NNR.0b013e3182830d87