To determine second trimester reference intervals for TSH and FT4.
10 Based on these eight cohorts, the overall prevalence for a major congenital malformation after exposure to carbamazepine monotherapy in the first trimester was 3.3%95%5% confidence interval 2.7 to 4.2) (table 1).
Outcomes were aggregated into mean in 3-month intervals, the trimester representing the unit of analysis.
Studies comparing immediate intrauterine device (IUD) insertion after first-trimester surgical abortion with interval insertion show similar efficacy and expulsion rates.
To establish normal, trimester-specific reference intervals for serum 17β-estradiol, progesterone (P), 17α-hydroxyprogesterone, cortisol, 11-deoxycortisol, androstenedione, DHEA, and DHEAS, measured simultaneously using isotope dilution tandem mass spectrometry.
The adjusted hazard ratio of venous thromboembolism during the first trimester was 4.22 (95% confidence interval 2.46 to 7.26).
The estimated change in MDI24 score with a 1-loge-unit increase in blood lead during the first trimester was −2.74 [95% confidence interval (CI), −5.78 to 0.29] based on a window-specific regression.
Results Maternal bereavement stress occurring preconception or during the prenatal period was not associated with a significant excess risk of psychosis in offspring (adjusted odds ratio, preconception 1.24, 95% confidence interval 0.96 to 1.62; first trimester 0.95, 0.58 to1.56; second trimester 0.79, 0.46 to 1.33; third trimester 1.14, 0.78 to 1.66).
We sought to investigate the effects of a patient's obstetric parameters on the induction abortion interval in second-trimester medical abortion.
A series of visits with a primary health care provider, beginning in the first trimester and continuing at recommended intervals throughout the pregnancy, constitutes the norm for PNC in Canada [ 2], although debate exists on the ideal frequency and content of PNC visits [ 3].
