When the various ultrasound parameters predict different gestational ages the fetus should be further evaluated to explain these differences. A comparison of the reliability of the estimated date of confinement predicted by crown-rump length and biparietal diameter. Because decisions to change the EDD significantly affect pregnancy management, their implications should be discussed with patients and recorded in the medical record. Assessment of gestational age in the second trimester by real-time ultrasound measurement of the femur length. The information should not be construed as dictating an exclusive course of treatment or procedure to be followed. If you choose to have a dating scan, it will most probably be your first scan. Growth adjustment sonographic age GASA:
Women's Health Care Physicians
This information is for your general information and use only and is not intended to be used as medical advice and should not be used to diagnose, treat, cure or prevent any medical condition, nor should it be used for therapeutic purposes. For example, an abnormally small FL measurement may suggest short-limb defects, a large BPD may be secondary to hydrocephalus, and an abnormally small or large AC measurement may suggest asymmetric intrauterine growth retardation or macrosomia, respectively. It may also detect a serious problem with either you or your pregnancy, some of which require further investigations or treatment. By 6 to 7 weeks gestation the fetus is clearly seen on trans-vaginal ultrasound and the heart beat can be seen at this early stage 90 to beats per minute under 6 to 7 weeks, then to beats per minute as the baby matures. Gestational age, synonymous with menstrual age, is defined in weeks beginning from the first day of the last menstrual period LMP prior to conception.