Title: Health and demographic characteristics of twin births : United States, 1988.
Authors: Taffel, Selma; National Center for Health Statistics (U.S.)
Publisher: U.S. Dept. of Health and Human Services, Public Health Service, Centers for Disease Control, National Center for Health Statistics,
Year: 1992
Subjects: Twins; Pregnancy, Multiple; Maternal Age; Birth Rate trends; Birth Rate trends; Maternal Age; Pregnancy, Multiple; Twins; Twins United States Statistics.; Multiple birth United States Statistics.; United States; United States Statistics, Medical.