Trimester of first prenatal visit:Time:Pt:^Mother:Ord:CDC.CS
trimester of first prenatal visit:time:pt:^mother:ord:cdc.cs
Trimester of first prenatal visit:Time:To identify measures at a point in time:^Mother:Ordinal:U.S. Centers for Disease Control and Prevention.CS
trimester of first prenatal visit:time:to identify measures at a point in time:^mother:ordinal:u.s. centers for disease control and prevention.cs