Accuracy of ultrasounds for dating Free cam chat thailand
Instead, you will be offered a nuchal translucency ultrasound.This measures a collection of fluid under the skin at the back of a baby's neck. Nearly all ultrasound after 10 weeks can be done through your tummy, and most units ask you to come with a full bladder.If you have an irregular cycle, or if you've recently been taking the contraceptive pill, working out the date from your LMP isn't a very accurate method.Ultrasounds are more accurate than using the LMP and, if the ultrasound date differs from your period dates, the ultrasound date will be used.
If your uterus is very deep in the pelvis or if you're overweight, you may be offered a vaginal ultrasound , which can get nearer to your baby. Kettering: National Down's Syndrome Screening Programme Westfall RE, Benoit C. The rhetoric of "natural" in natural childbirth: childbearing women's perspectives on prolonged pregnancy and induction of labour. The ultrasound scan may determine whether your pregnancy is currently experiencing miscarriage or not.But ultrasounds can also lift the lid on a few worries you might be having. The main reason for the ultrasound is to work out how many weeks pregnant you are, and to estimate your due date.The length of your pregnancy is calculated from the first day of your last menstrual period (LMP), even though you don't actually conceive until 14 days after your LMP, and later than this if your cycle is longer than 28 days.They always say that their dating is accurate to within 5 days either way anyway.Well I went for my first scan on Weds just gone & thought I was 8 6 but the lady measured me at 9 1 so only a couple of days out.
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You should still have a ultrasound between 18 and 22 weeks because more detail can be seen as your baby grows bigger.