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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.Scans are more accurate than using the LMP and, if the scan date differs from your period dates, the scan date will be used.So if you have a blood test at 14 weeks, the results would be of no help if a scan later revealed you were actually 16 weeks pregnant when the blood was taken. The main reason for the scan is to work out how many weeks pregnant you are, and to estimate your due date.If the blood test is taken too early because your dates are wrong, this might lead to you being given a high risk factor when, in fact, your baby is developing normally. 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.As well as that , I'm a complete control freak , and it freaks me out that I don't know what 's happening, or if everythings ok etc etc.I am thinking of getting a scan before my 12 week appointment, but wondering should I/shouldn't I ?
It shouldn’t be uncomfortable, and a big advantage is that you don't need a full bladder. This measurement, known as the crown rump length, is very accurate in the first trimester. Read in Bahasa: Imbasan pada trimester pertama Antenatal Care, Malaysia Health Ministry, Bottomley C, Bourne T. It may show a very minor problem, or something which may get better on its own. As with all screening tests, there can be false positive and false negative results. Nearly all scans after 10 weeks can be done through your tummy, and most doctor ask you to come with a full bladder. [Epub ahead of print, accessed April 2009] Gray JAM, Ward P. National Down’s Syndrome Screening Programme for England: a handbook for staff. The doctor will put some gel on your tummy and will move a small hand-held device, called a transducer, over your skin to get views of your baby. Kettering: National Down’s Syndrome Screening Programme.