A dating scan is an ultrasound scan to determine how many weeks pregnant you are and your due date.
Read on for more information about what a dating scan offers. A dating scan might be recommended to confirm your due date if you are unsure of your last menstrual period or your date of conception.
It is usually offered to pregnant women from 10 weeks to 13 weeks gestation, but can be carried out any time from 6 weeks. If you have had bleeding during your pregnancy or you have had previous miscarriagesyour doctor or midwife may recommend an early dating scan from 6 to 10 weeks gestation. If you choose to have a dating scan, it will most probably be your first scan.
You will need to get a How does a pregnancy dating scan work from your doctor or midwife for a dating scan. A dating scan is carried out by ultrasound.
A sonographer, who is usually a radiographer or a midwife trained in ultrasound, will complete your scan.
If the scan is after 10 weeks, ultrasound recordings are usually made through your abdomen. The sonographer will put gel on your abdomen and move a hand-held device called a transducer, back and forward over your skin.
In some situations, such as when the scan is completed before 10 weeks of gestation or you are overweight, you may also need a vaginal scan. Your sonographer will let you know if this is needed. For an abdominal dating ultrasound, you will need to have a full bladder. You may be asked to drink some water and not go to the toilet beforehand because a full bladder helps to push your womb up to give a better picture.
For a vaginal scan, you can have an empty bladder. This will provide a fairly accurate estimate of how many weeks pregnant you are. 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.
Information on pregnancy ultrasound scans including when they are taken, what it can be used for, dating scans, anomaly scans, plus links to trusted resources.
In the second trimester of pregnancy, you may be offered to have an morphology scan anomaly scan. Learn about what it looks for and when it is performed. A nuchal translucency scan is part of the ultrasound scan that may give an indication of chromosomal abnormality.
Learn more about how and when it is performed. InsideRadiology provides free and easily accessible, accurate, up to date and credible information about medical imaging tests and procedures.
During your pregnancy, you will be offered a number of tests and scans. The aim is always to check on the health of you and your baby, but it can sometimes be overwhelming and confusing.
Ultrasound uses sound waves to create an image picture. The sound waves can not be heard and the power of the sound waves used is very low. In pregnancy an ultrasound scan can be used to look at the developing baby. Knowing what check-ups, screenings and scans to have and when to have them during your pregnancy is important information for every pregnant woman.
Information on routine antenatal screening tests during pregnancy including weight and height, blood tests, infections, pap test, plus links How does a pregnancy dating scan work trusted resources.
In the meantime, we will continue to update and add content to Pregnancy, Birth and Baby to meet your information needs. 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. The information is not a substitute for independent professional advice and should not be used as an alternative to professional health care.