Impact smoking has on pregnant woman

  In the United states, is there a relationship between number of births, average age of mothers, race and number cigarettes consumed during first trimester? method: The Births (Natality) online databases in CDC WONDER report birth rates, fertility rates and counts of live births occurring within the United States to U.S. residents and non-residents. The 2019 data will be used in this study. & report the results of a data collected in spss