Obstetric (Pregnancy)

FREE subscriptions for doctors and students The Fetal Anomaly screening programme has working groups looking at standards, and education and training. Further information on all above aspects is available here: www. This site is intended for healthcare professionals. Medical search. At the first antenatal appointment women should be offered an early ultrasound scan for gestational age assessment. This scan should ideally take place between 11 weeks and 0 days and 14 weeks and 1 day Ultrasound screening for fetal anomalies should be routinely offered, normally between 18 weeks and 0 days and 20 weeks and 6 days 1. Antenatal screening – working standards for Down’s syndrome screening

Early pregnancy scan (booking or dating scan)

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What it is: Your first ultrasound scan is called a dating scan and will take place between weeks 8 and 12 of your pregnancy. A vaginal probe may be used during​.

Unless there are concerns about the pregnancy it is better to wait to have this scan after 7 weeks as the images are clearer for you to see and better for us to measure. If you come before 7 weeks the baby will be less than 1cm in size and so the scan sometimes has to be performed transvaginally placing the probe inside the vagina to enable us to see the baby well enough to measure and to see the heartbeat. We ask that you come with a full bladder for this scan as it usually allows us to get the best possible picture of the baby.

If you decide to go ahead with this optional screening test you will be offered a scan between 12 weeks and 13 weeks 6 days ideally 12 weeks. This is the only time that this scan can be performed. We send these measurements to LabPlus in Auckland where a blood sample from you is also sent. LabPlus then calculate the risk or chance that your pregnancy is affected with Down Syndrome. Because this calculation is not carried out on site we are not able to give you the results straight away on the day.

LabPlus will contact your midwife with the results and she will discuss the results with you. This is a detailed ultrasound scan, usually carried out when you are 20 weeks pregnant. So whilst a normal 20 week scan is very reassuring it cannot guarantee a healthy baby. This scan usually takes around 30 minutes although it can take longer if the baby is in a difficult position or if a problem is detected. The quality of the pictures we get depend on a number of factors including the position of the baby, the position, shape and structure of your womb, maternal BMI and the gestation of the pregnancy.

If for any of the reasons listed above we are unable to complete our checks on your baby we will arrange a follow up scan for you.

Antenatal Screening

During your pregnancy, you’ll be offered a range of tests, including blood tests and ultrasound baby scans. They are designed to help make your pregnancy safer, check and assess the development and wellbeing of you and your baby, and screen for particular conditions. You don’t have to have any of the tests, but you need to understand the purpose of them so you can decide whether to have them or not. Discuss this with your maternity team.

Anaemia makes you feel tired and less able to cope with loss of blood when you give birth.

The scan takes 30 minutes to perform. When you arrive for your scan you will be asked to fill out a form about when your last menstrual cycle took place (if.

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This combined test is an extremely accurate non-invasive screening test available to help identify a fetus at risk for Down syndrome as well as other chromosomal abnormalities and some major structural abnormalities. The sensitivity of this only recently eclipsed by NIPT. An ultrasound screening test is non-invasive and does not have any side effects or complications.

Each time you see your Midwife they will let you know the date and time of your next Ultrasound scans use soundwaves to build a picture of your baby in your uterus. Your birth plan is a record of what you would like to happen during your​.

A first trimester early pregnancy and dating ultrasound is an examination you have during the first 13 weeks of pregnancy. Due to the size of the developing structures and embryo, it is uncommon to perform an ultrasound before 5 weeks gestation 5 weeks after the start of your last menstrual period. Ultrasound is not consistently able to confirm viability and fetal heart activity prior to 6 weeks gestation, so unless there is an urgent need to have an early pregnancy and dating scan earlier most of these ultrasounds are performed after 6 weeks and ideally at 8 weeks for dating purposes.

Urgent cases may still be performed earlier, please discuss this with your referring doctor. Your ultrasound may be performed transabdominally or transvaginally. Transvaginal ultrasound involves placing a thin transducer slightly thicker than a tampon into the vagina. The transvaginal ultrasound can offer extra detail to the examination as it allows the ultrasound probe to come into close proximity to the uterus womb. A transvaginal scan is optional for all patients and it is your decision whether to proceed with that part of the examination.

Ultrasound, both transabdominal and transvaginal, is considered to be safe during the first trimester of pregnancy. Your examination will be performed by a sonographer. Upon being taken into the examination room the sonographer will introduce themselves, confirm your identity and examination. A clear gel is applied to the skin over the area to be examined.

Scans in the first trimester

It is important that you see a Midwife as early as possible in your pregnancy. Women have their first and longest Antenatal appointment between 6 – 12 weeks of pregnancy with their Midwife. This is called a “booking” visit and involves questions about your health, any illnesses or previous pregnancies. This helps us to see if there may be any possible problems during your pregnancy and allows us to tailor your Antenatal care for your specific needs.

At the start of your pregnancy, during your booking visit, your Midwife will make an assessment based on your previous and current medical and pregnancy history. If you have not had any problems, then the Midwife will state that you are low risk and will be suitable for Midwifery-led care.

You will need to go to hospital for your ultrasound scans. At this appointment, you will have your first ultrasound scan which is known as the dating scan. From around 28 weeks, your antenatal appointments will take place every two or​.

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Dating scan

A dating scan is an ultrasound examination which is performed in order to establish the gestational age of the pregnancy. Most dating scans are done with a trans-abdominal transducer and a fullish bladder. If the pregnancy is very early the gestation sac and fetus will not be big enough to see, so the transvaginal approach will give better pictures. Dating scans are usually recommended if there is doubt about the validity of the last menstrual period.

This written information is for guidance only and does not Fact Sheet. Ultrasound in early pregnancy (before 12 weeks) – Dating Scan. Ultrasound It may take you by surprise. • All around pregnancy is in the right place this time. An early.

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How big will my baby be at the dating scan?

12 week pregnancy dating scan: here’s what to expect

Your first pregnancy ultrasound can happen between 8 and 14 weeks and is also known as the dating scan. You may well be full of mixed emotions, so having your partner or friend to share the moment could be a good idea. For most mums the 12 week scan will be their first baby scan and it can happen anytime between 8 and 14 weeks and is also known as the dating scan. Your sonographer will check that the heart is beating nicely and baby is growing normally.

The position of the umbilical cord will be visible and any major issues with the skull or abdominal wall could be spotted now. If you choose to have it, a blood sample will be taken, and the nuchal translucency will be measured.

Will the dating scan happen at exactly 12 weeks? You should have your first pregnancy ultrasound scan in between 10 weeks and 13 weeks pregnant, but it can.

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Community groups. Home Pregnancy Prenatal health Prenatal ultrasound scans. In this article When will I have my dating scan? How accurate are dating scans? What else will the dating scan reveal? What happens at a dating scan? How big will my baby be at 12 weeks? Can I have prenatal screening at the same time?

How accurate is ultrasound in dating a pregnancy?-Dr. Nupur Sood