Sentence examples for based on second trimester from inspiring English sources
In the Czech Republic, prenatal diagnostics of Down syndrome (DS) is based on second trimester screening biochemical and ultrasound methods.
The effect of maternal height was generally stronger when pregnancy length was based on second trimester ultrasound compared to last menstrual period.
The association based on third trimester smoking was very similar (P = 0.0003; Table 2 and Supplementary Material, Table S1).
In this era, with gestational age based on first trimester ultrasound, the incidence of post-term pregnancy is reduced to 3-53-5% even less [ 13– 15].
Because in 1964 all gestational ages were based on the last menstruation, while in 2002 almost all gestational ages were based on first trimester ultrasound and this might influence gestational age, we controlled for birth year.
The assignment of gestational age (GA) in completed weeks (i.e., 23 0/7 to 27 6/7) weeks was based on the date of the mother's last menstrual period unless this was not available, in which case an obstetrician's best estimate based on first trimester ultrasound when available, otherwise a late ultrasound was used.
We will ask obstetrical low risk women ≥ 18 years with a singleton pregnancy in stable cephalic position and a certain gestational age of 40 + 5 - 41 + 0, based on first trimester ultrasound and without contra-indications for expectant management until 42 weeks for consent to participate in our study and to be allocated to induction of labour at 41 + 0/+1 weeks or at 42 + 0 weeks.
Gestational age at delivery estimation was based on second-trimester ultrasound scan, or if this was not available then based on last menstrual period.
However, our sensitivity analysis based on the Swedish data, in which gestational age is primarily based on second-trimester ultrasound estimates and has been well-validated [ 29], solidifies our findings.
The gestational age was estimated based on first-trimester or second-trimester ultrasonography measurements.
