First Dating Scan - What to Expect? | Bub Hub
12 week pregnancy dating scan: What do I need to know? It's your first pregnancy ultrasound where you see your baby for the first time, but what's it all about?. If you choose to have a dating scan, it will most probably be your first scan. You will need to get a referral from your doctor or midwife for a dating scan. Find out what happens at your 1st NHS ultrasound pregnancy scan, why it's called a dating scan and whether you find out your baby's sex.
You will be able to see for yourself on our plasma screen monitors! After emptying your bladder and wearing a gown you will lie on the bed and a special probe is positioned in your vagina. This has a sterile disposable cover. During this examination the vaginal probe is moved with varying pressure at different angles to obtain images of the uterus and ovaries. The sonographer will leave the room after the scan to review the images and to discuss them with the Radiologist.
You will be given your expected due date on the day and will be able to take away images of the scan on our USB stick. Risks Ultrasound is safe to use throughout your pregnancy. Occasionally there is some discomfort from probe pressure on a full bladder or from the vaginal probe manipulation.
If this is extremely painful please let us know. Benefits You will be able to get your expected due date of your baby on the day. You will be made aware if there is anything of concern on the day. If you have any questions you will be able to ask our on-site radiologist. Common questions about this scan What is an Ultrasound scan?
An ultrasound scan uses high-frequency sound waves to create images of the inside of the body. Sound waves are used instead of radiation which makes them safe. Will my baby be ok during the scan? Ultrasound can be safely used during pregnancy. Do I need to do anything before I have this scan? You will need to arrive with a full bladder before you have your scan. A full bladder allows us to see your uterus and ovaries more clearly.
We normally recommend that you have 2 glasses of water a half hour before you arrive for your scan. How long will the scan take? The scan will take up to 30 minutes on the day. What happens on the day? You will lie down with your tummy exposed and a towel tucked into your pants. The sonographer will place gel on your tummy and which allows the probe to move more freely over your tummy.
Pressure will be applied but this is usually not painful to you or harmful to the baby. We like you to have a full bladder as it makes it easier for us to see your uterus and ovaries from across your tummy.
For women who have recently had a miscarriage and have soon conceived again. For women who have recently stopped using contraception such as oral contraceptives or alternative forms of hormonal contraception. For women who are breastfeeding and although they may not have resumed menstruating, have conceived again. In any other situation, or for any other reason why confirming the gestational age of the embryo is considered important.
How big will my baby be at the 7 week ultrasound? The limbs and the yolk sac, though obviously important, are not the primary means of measuring growth. An average length of the embryo at 7 weeks is anywhere between 5mmmm. The average weight is less than 1 gram.
Obviously, every pregnancy is unique and individual factors influence the size of the embryo at this early stage, and the embryo shows development week by week. When should I have my earliest scan? The ideal time for a sonographer to assess the gestational age in the first trimester is between weeks of pregnancy.
This is the period of time which provides the most accurate assessment.
Generally, ultrasounds which are performed in the first trimester are within days of being accurate in terms of assessing gestational age. This is because although every little embryo is unique, there are still defining characteristics of development which apply to all embryos at particular stages of early gestational development.
As the embryo matures to a foetus, individual genetics and growth factors influence its growth.
This is why an early pregnancy dating scan, rather than one done in the later stages of pregnancy, is considered more accurate when assessing the expected date of delivery.
With maturity, the size of the baby correlates less to its age than in the early weeks.
How will my 7 week ultrasound be done? There are two ways of having a seven week ultrasound. One is via the abdomen — transabdominally and the other is through the vagina — transvaginally. Some sonographers believe that at seven weeks of gestation, transvaginal ultrasound provides the best and most accurate visualisation.
With this form of scan it is not as necessary for the mother to have a full bladder. Later on as the pregnancy progresses, a full bladder is not necessary as the enlarging uterus is no longer contained in the pelvic rim.
7 Week Pregnant Ultrasound Scan - Huggies
In very early pregnancy, the embryo and pregnancy sac may simply be too small to see very much at all. But with every day which passes, the embryo becomes bigger and more advanced in its development. Am I having a boy or a girl? At seven weeks of gestation it is still too early to identify what gender sex the baby will be.
It is also impossible to do a thorough foetal screening assessment because it is still just too premature in terms of embryonic development. In some respects the seven week ultrasound can be quite accurate because the embryo is developing very quickly. They are also not as mobile and active as they will be with future development.