A Systematic Review. With rare exception, if a first-trimester ultrasound examination was performed, especially one consistent with LMP dating, gestational age should not be adjusted based on a second-trimester ultrasound examination. Last menstrual period provides the best estimate of gestation length for women in rural Guatemala. Lessons learnt from enrolment and follow up of pregnant women and their infants in clinical trials in South Africa, a low-middle income country. Morgan 1 ; Danielle B. The Danish Fetal Medicine Database:
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Predicting delivery date by ultrasound and last menstrual period in early gestation.
A comparison of pregnancy dating methods commonly used in South Africa: a prospective study.
Obstet Gynecol ; FH was less accurate with increasing obesity. This study shows that in a resource-poor area where late presentation, unreliable LMP history taking and obesity are common, dating with US was significantly better than a reliance on clinical methods, even when certain LMP appeared to be compatible with FH. By using an older cohort this selection bias was minimized, since induction-rate in general is increasing. Elizabeth J Poggenpoel. Correlation between US and any of the other three methods was poor to moderate. Menstrual dates systematically overestimated gestational age at term when compared with scan dates.