Stillbirth Rates and Risk Factors for Stillbirths among Zygotic Twins in Japan, 1995-2008

Data on Live Births (LBs) and Fetal Deaths (FDs) were obtained from vital statistic records maintained by the Statistics and Information Department, Ministry of Health, Labour and Welfare (Tokyo, Japan) for the years 1995-2008. These data cover the entire Japanese population. LB certificates contain information on nationality, sex, date of birth, BW, GA, parental dates of birth and age, single or multiple birth, and birth order in multiple births, as well as other details. FD certificates (at 12 completed weeks of gestation and over) contain the same information, including the date, spontaneous or induced termination of pregnancy and cause of spontaneous FD, but excluding the parental dates of birth.