Does anyone know if the 12 week scan HAS to be done exactly between 12 weeks & 13 weeks 3 days? If you are a few days out does it matter or will that mean the test won't be as accurate? What if you aren't exactly sure of your dates due to a longer cycle (5 weeks)?
Would it be recommended to have a dating scan earlier on in this case?
Also is 12 weeks taken from the first day of ur last period?
Sorry if these questions sound silly. I didn't realise the scans had to be done between such exact dates. Any help you can give would be appreciated