Sonogram dating for due date
However, many differences in each woman’s cycle may hinder the accuracy of the conception date calculation.
The viability of sperm varies as well, which means intercourse three to five days prior to ovulation may result in conception.
Ultrasounds are usually combined with other tests, such as triple tests, amniocentesis, or chorionic villus sampling, to validate a diagnosis.
An ultrasound exam may be performed throughout pregnancy for the following medically-necessary reasons: First Trimester: The ultrasound is a noninvasive procedure which, when used properly, has not demonstrated fetal harm.
Fetal Echocardiography – Uses ultrasound waves to assess the baby’s heart anatomy and function.
This is used to help assess suspected congenital heart defects.
If there are any questions regarding gestational age, placenta location, or possible complications then more ultrasounds may be scheduled.
The different types of procedures include: Transvaginal Scans – Specially designed probe transducers are used inside the vagina to generate sonogram images.
The long-term effects of repeated ultrasound exposures on the fetus are not fully known.
It is recommended that ultrasound only be used if medically indicated. The heartbeat may not be detected for reasons that include: tipped uterus, larger abdomen, or inaccurate dating with last menstrual period.
The traditional ultrasound procedure involves placing gel on your abdomen to work as a conductor for the sound waves.
Your healthcare provider uses a transducer to produce sound waves into the uterus.