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CVS (Chorionic Villus Sampling)
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Amniocentesis
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When can I choose this method? |
Very early on, 11th-18th week of pregnancy |
Later, 15th-21st week of pregnancy |
| When should I have the test done? |
If any other procedures are dependent upon the results of the pre-natal paternity test, please ensure that you allow as much time as possible. It generally takes at least 9 working days from receipt of your samples in London before we will have results, and if there are any problems and we have to have Dr Farrell send the back-up samples that he retains, it could be as much as 4 weeks. |
What is the procedure? |
A sample of fetal chorionic villi is obtained by inserting a needle under ultrasound guidance. |
Approximately 1 ml of amniotic fluid is extracted from the amnion, surrounding the developing fetus. |
What if I am expecting twins (or more)? |
Testing in the case of multiple-fetus pregnancies is theoretically possible, but as a matter of policy DNA Solutions will only perform pre-natal paternity tests where the pregnancy is either a single fetus or identical twins (a shared amniotic sac). If you need to have a test carried out during a multiple-fetus and multiple-amniotic sac pregnancy, please contact us to discuss whether anything can be arranged (however, any such test would be at the client’s own risk and no refunds could be given if DNA Solutions were unable to clearly identify DNA from each individual fetus). |
How do you obtain the parents DNA? |
Samples from both the mother and father are taken using simple mouth swabs contained in our home testing kit. |
Can you test without the father’s permission? |
No. Even if you are from overseas, UK law requires that permission is given by everyone being tested. However, if the father has given his permission, but is unavailable to provide a sample, other items can be tested (please contact us for details) |
How accurate is the test? |
A test using samples taken by CVS is just as accurate as a post-natal test. |
A test using samples taken by Amniocentesis is just as accurate as a post-natal test. |
| Will the test also show the sex of my baby? |
Yes, but since this will generally be known by this stage of the pregnancy, we will only include it in the results if requested. |
| Are there any side effects |
Common side effects include some bleeding, period-like pain and discomfort in the abdominal area. You should contact your doctor immediately if you experience heavy bleeding, pain or a high temperature. |
Common side effects include mild pain or stomach cramps. You should contact your doctor immediately if you experience heavy bleeding, pain or a high temperature. |
| Who takes the samples? |
Unless you have made your own arrangements (through your GP and generally only available for medical reasons), samples are taken by Dr Tom Farrell at the Thornbury Hospital, Sheffield, South Yorkshire. |
| What are the risks to my baby? |
Chances of fetal loss are increased by 1%. Please discuss these risks with your doctor before making a decision. |
Chances of fetal loss are increased by 0.5%. Please discuss these risks with a doctor before making a decision. |
| What if I am unable to obtain a fetal sample? |
It is important that you only pay for the test and obtain a home testing kit after you have made the appointment with Dr Farrell. If you are subsequently unable to attend the appointment (and unable to reschedule), your fees will be refunded (less a £29 administration fee and any cancellation fee charged by Dr Farrell). |
| What must be prepared in advance? |
You will need to have written evidence of the mother’s blood type from your G.P. or, have paid an additional £100 for Dr Farrell to perform this on the day. You will also need to have prepared samples (using our mouth swabs) from the alleged father unless he will also be attending the appointment in Sheffield. |