Document Type : Original Research Article
Authors
1 Assistant professor. Department of midwifery. North Khorasan University of medical Sciences.
2 Nursing and Midwifery Care Research Center, Mashhad University of Medical Sciences, Mashhad, Iran.
3 M.Sc in Midwifery, Milad Infertility Center, Mashhad University of Medical Sciences, Mashhad, Iran.
4 M.Sc in Statistics, Deputy of Research and Technology, North Khorasan University of Medical Sciences, Bojnurd, Iran.
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