PMC/PubMed Indexed Articles
Indexed In
- Genamics JournalSeek
- RefSeek
- Hamdard University
- EBSCO A-Z
- OCLC- WorldCat
- Publons
- Geneva Foundation for Medical Education and Research
- Euro Pub
- Google Scholar
Useful Links
Share This Page
Journal Flyer
Open Access Journals
- Agri and Aquaculture
- Biochemistry
- Bioinformatics & Systems Biology
- Business & Management
- Chemistry
- Clinical Sciences
- Engineering
- Food & Nutrition
- General Science
- Genetics & Molecular Biology
- Immunology & Microbiology
- Medical Sciences
- Neuroscience & Psychology
- Nursing & Health Care
- Pharmaceutical Sciences
Yoko Imaizumi
Yoko Imaizumi
The Center for Twin Research, Graduate School of Medicine,
Suita City
Japan
Publications
-
Research Article
Perinatal Mortality Rates and Risk Factors for Mortality among Zygotic Twins and Singletons in Japan, 1995-2008
Author(s): Yoko Imaizumi and Kazuo HayakawaYoko Imaizumi and Kazuo Hayakawa
Objective: We aimed to determine the perinatal mortality rates (PMRs) for monozygotic (MZ) twins, dizygotic (DZ) twins, and singletons, together with the associated risk factors for these PMRs. Study design: PMRs of zygotic twins and singletons were estimated using Japanese vital statistics from 1995 to 2008. Results: Declines were seen in fetal death rates [FDRs; defined as deaths after a gestational age of (GA) 22 weeks], early neonatal death rates (ENDRs), and PMRs from 1995 to 2008 to approximately 1/4–1/3 for DZ twins and to 1/2 for both MZ twins and singletons. ENDRs and PMRs were the lowest at maternal ages (MAs) of 30–34 years for MZ and DZ twins and at 25–29 years for singletons. Each mortality rate in singletons was significantly lower at 25–29 years compared with those at other MAs. PMRs were significantly hig.. View More»
DOI: 10.4172/2167-0897.1000188