1. Births, marriages, divorces, and deaths for July, 1990;National Center for Health Statistics,1990
2. Assessment of uterine activity in ambulatory patients at high risk of preterm labor and delivery;Katz;Am J Obstet Gynecol,1986
3. Detection of preterm labor by ambulatory monitoring of uterine activity: a preliminary report;Katz;Obstet Gynecol,1986
4. Prevention of preterm birth by ambulatory assessment of uterine activity: a randomized study;Morrison;Am J Obstet Gynecol,1987
5. Home uterine activity monitoring is associated with a reduction in preterm birth;Hill;Obstet Gynecol,1990