Dating Scan (8-22 Weeks)
Private Dating Scan at home in London for £695, estimating gestational age, due date and fetal development from 8–22 weeks.
Turnaround time
1 day
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Overview of the Dating Scan (8-22 Weeks)
The Dating Scan is a pregnancy ultrasound offered between 8 and 22 weeks to estimate gestational age and provide an ultrasound-based expected date of delivery.
Pregnancy dating is based on fetal measurements.
Earlier in pregnancy, measurements such as crown-rump length can provide particularly accurate dating information.
As pregnancy progresses, head, abdominal and long-bone measurements can be used to assess fetal size and support gestational-age estimation.
However, pregnancy dating becomes less precise later in gestation because normal differences in fetal size increase.
For this reason, first-trimester ultrasound generally provides the most reliable ultrasound dating.
The scan can also confirm fetal heartbeat, number of babies and pregnancy location where these have not already been established.
It does not replace the detailed Anomaly Scan or other routine antenatal screening.
This private service has a wider 8–22-week booking window than the routine NHS dating scan, which is generally offered earlier in pregnancy.
The service is available as a home visit only.
What Does the Dating Scan (8-22 Weeks) Assess?
Gestational age
Fetal measurements are used to estimate how many weeks pregnant you are.
Estimated due date
Ultrasound measurements can provide an expected date of delivery.
Fetal heartbeat
Confirms cardiac activity where expected for gestational age.
Number of babies
Identifies a singleton or multiple pregnancy.
Fetal measurements
Measurements appropriate to gestation are recorded.
Pregnancy location
The pregnancy location can be confirmed where this remains relevant.
Fetal size
Measurements later in pregnancy provide information about size, although they are less precise for establishing the original conception date.
Who May Benefit From the Dating Scan (8-22 Weeks)?
People unsure of the first day of their last menstrual period - Ultrasound can provide an independent gestational estimate.
People with irregular menstrual cycles - Cycle dates may not accurately predict gestation.
People who conceived after an uncertain ovulation date - Ultrasound measurements can help estimate pregnancy timing.
People who have not previously had a dating scan - Private ultrasound can provide gestational information.
People with a discrepancy between menstrual dates and previous measurements - Repeat assessment can provide additional context.
People requiring confirmation of fetal heartbeat and number of babies - These can be assessed during the examination.
Symptoms and Reasons to Consider the Dating Scan (8-22 Weeks)
Dating scans are usually booked for gestational assessment rather than symptoms.
Uncertain pregnancy dates - Ultrasound can provide a measurement-based estimate.
Irregular or absent periods before conception - Menstrual dating may be unreliable.
No previous pregnancy ultrasound - The scan can establish gestational information.
Uncertainty about the expected due date - Fetal measurements can support calculation.
Need to confirm the number of babies - Singleton and multiple pregnancies can normally be identified.
A previous dating discrepancy - Repeat imaging can provide additional measurement information.
Pregnancy bleeding, severe abdominal pain, fainting, reduced fetal movements later in pregnancy or other concerning symptoms require appropriate maternity assessment.
A routine home Dating Scan should not delay urgent pregnancy care.
How to Prepare for the Dating Scan (8-22 Weeks)
Dating accuracy is generally greatest earlier in pregnancy.
Measurements performed later in the 8–22-week window provide useful information but cannot always redefine gestational age with the same precision as first-trimester dating.
What Happens During the Dating Scan (8-22 Weeks)?
Is the Dating Scan (8-22 Weeks) Safe?
The scan uses diagnostic ultrasound rather than X-rays.
There is no ionising radiation.
Ultrasound is widely used throughout pregnancy and is considered safe when used appropriately by trained healthcare professionals.
How to Book Your Dating Scan (8-22 Weeks)
Choose the Dating Scan (8-22 Weeks)
Select the private pregnancy-dating ultrasound.
Book your home appointment
Provide your London address and preferred time.
Confirm gestational information
Supply menstrual dates or previous scan dates where known.
Prepare according to gestation
Follow any full-bladder instruction supplied.
Have the scan at home
The ultrasound professional performs the dating examination.
Receive your report
Your dating measurements and authorised report are delivered securely.
When Will I Receive My Results?
Gestational measurements can usually be discussed during the appointment.
The expected formal reporting turnaround is approximately 1 day.
The report can include the estimated gestational age, expected due date and relevant pregnancy observations.
Understanding Your Dating Scan (8-22 Weeks) Results
The ultrasound-derived gestational age is based on fetal measurements.
In early pregnancy, crown-rump length provides particularly useful dating information.
At later gestations, measurements such as head circumference, abdominal circumference and femur length can provide an estimate of fetal size.
Differences of several days between menstrual dates and scan dates can be common.
A larger discrepancy may lead your maternity team to use the ultrasound-derived date depending on gestation and established maternity protocols.
What Can the Dating Scan (8-22 Weeks) Detect?
Gestational age - Fetal measurements provide an ultrasound estimate of pregnancy duration.
Estimated due date - Gestational measurements can be used to calculate an EDD.
Multiple pregnancy - More than one baby can be identified.
Fetal heartbeat - Cardiac activity can be confirmed.
Fetal size - Measurements provide information about growth at the time of the scan.
Pregnancy location - In earlier pregnancy, the scan can confirm an intrauterine pregnancy where visible.
Limitations of the Dating Scan (8-22 Weeks)
Later dating is less precise - Natural variation in fetal size increases as pregnancy progresses.
The scan is not a detailed anomaly examination - A dedicated Anomaly Scan remains important.
Not every pregnancy complication is visible - Ultrasound dating answers a specific clinical question.
Fetal position can affect measurements - Repeat views may occasionally be necessary.
It does not replace antenatal care - Routine maternity appointments should continue.
Why Book the Dating Scan (8-22 Weeks) With London Blood Tests?
Private home pregnancy ultrasound - The sonographer attends your London address.
Wide 8–22-week service window - Dating information can be obtained across several pregnancy stages.
Due-date estimation - Fetal measurements support an expected delivery date.
Confirms heartbeat and pregnancy number - Useful additional observations can be made.
No ionising radiation - Ultrasound uses sound waves.
Professional ultrasound reporting - Measurements and findings are formally documented.
Can complement NHS maternity care - Results can be shared with your maternity provider.
Clear pricing - The Dating Scan (8-22 Weeks) costs £695.
Private Dating Scan (8-22 Weeks) at Home in London
London Blood Tests provides private Dating Scan appointments at home in London between 8 and 22 weeks.
The scan costs £695 and is available as a home visit only.
It provides an ultrasound estimate of gestational age and expected delivery date together with relevant fetal observations.
The formal report is expected approximately 1 day after scanning.