How accurate is a due date that is determined by ultrasound?
Can your pregnancy scan give the wrong due date?
16 Mar I thought it was the 12 week scan also! thank you for your replies, does anyone think there could be a chance that i conceived on or after the 9th jan? by the due date 21st september, my period started on the 19th dec my next period was due on the 14thth jan that didn't come ofcourse! i'm thinking. A dating scan is one that is performed in order to establish the gestational age of the pregnancy, and also reveal important information such as; the presence of a heart beat, the number of fetuses and gestation sacs Ultrasounds performed during the first 12 weeks of pregnancy are generally within 3 - 5 days of accuracy. Give or take how many days out can a 12 week ultrasound be?.
Didn't get the email? Look at how they take the measurements and then consider that the baby is about the size of a blueberry so one link two millimetres makes a big difference to the overall measurement. Gender Don't know yet Boy Girl. Sorry, ignore my waffle. This screening test is not a definite diagnosis of chromosomal problems, but rather provides a risk assessment.
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Last pregnancy I was told that growth of babies is very consistent until 12 weeks. My Pregnancy and Baby Today. This simply does not work out - I am sure of my dates and even did an ovulation test to check when I could conceive that month. Gender Don't know yet Boy Girl.
If you think you have a medical emergency, call your doctor or emergency services immediately. User Name Remember Me? Forum Jump Today's Posts Search. Aug 13th, Give or take how many days out can a 12 week ultrasound be? My 12 week scan put me like 9 days ahead of my date using lmp!
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When I checked against the date of conception it matched up with the scan date. When I se my ob in a few weeks I'll see what she thinks about officially changing my due date. From what I've heard,most often lmp is used because most http://minimoving.info/t/how-to-stay-confident-when-dating.php know the date of conception but lmp is not as accurate.
I got pregnant straight after a MC, no period inbetween. From what I know, they are How Accurate 12 Week Dating Scan accurate than going by LMP, so you should be just fine! They will change your due date later if they feel like they need to. My doctor says he never goes by LMP dates and felt my 12 week scan was more accurate for dating than the 6 week so thats what he is going by.
LMP is only used until the dating scan as it's the best guess until they measure the baby. The scan measurements are supposed to be accurate to within a couple of days. Both pregnancies we were sure of the date the first time I was working away loads and this time hubby was working away, so we kinda only had the one opportunity lol! More info my daughter the LMP was definitely wrong as my periods were irregular and the scan told us the exact dates we had worked out ourselves.
I know the sperm can survive a few days so you can conceive later than the day you have sex but not earlier! My doctor calculates your LMP due date based on the actual amount of days in your cycle.
This time all I have to go by is the scan dates: My 12 wk scan put me a whole week ahead vs my lmp date. My lmp is good, because I was keeping track, but I truly don't know when I ovulated, so How Accurate 12 Week Dating Scan The dating scan should be the most reliable, but end of the day you're talking maybe a maximum of 2 weeks discrepancy which is rare anyway and as a baby can come over a 5 week period there isn't a need to stress.
There was a really http://minimoving.info/t/how-to-dump-someone-you-arent-dating.php article on the BBC about how some medical professionals think they should do away with the concept of a "due date" due to the 5 week window.
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Trying To Conceive Over Long Term Trying To Conceive. Page 1 of 2. How reliable are 12 week dating scans when lmp isn't remembered? US of A Posts: Gold Coast Queensland Posts: