Uterine fibroids, amniotic fluid abnormalities, increased maternal body mass index BMIand fetal growth abnormalities are some examples of circumstances that can alter the accuracy of fundal height measurement. Review Ultrasound in twin pregnancies. BabyCenter Australia Dating scans. For example, a patient whose fundal height is 25 cm can have a gestational age range from 23 to 27 weeks. A recommended approach would be to perform transabdominal ultrasound with a full bladder, if the transvaginal approach is needed, have the patient empty her bladder before a transvaginal ultrasound. This Committee Opinion outlines a standardized approach to estimate gestational age and the anticipated due date.
Using a single ultrasound examination in the second trimester to assist in determining the gestational age enables simultaneous fetal anatomic evaluation.
Women's Health Care Physicians
Estimating the date of confinement: Am J Obstet Gynecol ; Number 55, September replaces practice pattern number 6, October Therefore, one can date the pregnancy according to its true date or true beginning or in fetal age terms. The eight-week pregnant uterus feels like a large orange. But it is important to remember that only a few women go into labour on their due date, so it can be more helpful to think about the month in which you are expecting your baby, rather than the exact day. Predicting delivery date by ultrasound and last menstrual period in early gestation.