To determine which ultrasound biometric parameters are superior when gestational age is uncertain.
To determine whether ultrasound gestational age assessment is cost effective.
For many women, ultrasound scans are the highlight of pregnancy.
It's very exciting to "see" your baby in the womb, often moving his or her hands and legs.
The most common misconception we encounter almost daily, has to do with how accurate ultrasounds are in fixing the EDC at different stages of pregnancy.
Ultrasound scans use sound waves to build a picture of the baby in the womb.
Outcomes: To determine whether ultrasound dating provides more accurate gestational age assessment than menstrual dating with or without the use of ultrasound.
To provide maternity health care providers and researchers with evidence-based guidelines for the assignment of gestational age.
In fact, when a woman who has very regular, "textbook" 28 day cycles presents for prenatal care, this often turns out to be the correct EDC more often than not.Benefits, harms, and costs: Accurate assignment of gestational age may reduce post-dates labour induction and may improve obstetric care through allowing the optimal timing of necessary interventions and the avoidance of unnecessary ones.A registered nurse with more than 25 years of experience in oncology, labor/delivery, neonatal intensive care, infertility and ophthalmology, Sharon Perkins has also coauthored and edited numerous health books for the Wiley "Dummies" series.Perkins also has extensive experience working in home health with medically fragile pediatric patients.Before the advent of routine ultrasound in pregnancy, medical personnel estimated a baby's due date by the date of the last menstrual period and by feeling the uterus and determining the size to see if it matched the given due date.Grey (unpublished) literature was identified through searching the websites of health technology assessment and health technology-related agencies, clinical practice guideline collections, clinical trial registries, and national and international medical specialty societies.