Measuring one week ahead

Lara

Hi,

This is an <a href="https://glowing.com/glow-fertility-program">IVF</a> pregnancy so I know exact dates. The <a href="https://glowing.com/glow-fertility-program">IVF</a> clinic had my due date as 8 Oct so I should be 12 weeks 6 days today but the scan put me at 13 weeks 6 days! Bit of a surprise for me and also the ultrasound tech who must have taken the CRL about 6 times to check, but always the same! Anyone else had <a href="https://glowing.com/glow-fertility-program">IVF</a> and measuring so far ahead? Could this be a possible problem or just a big baby / early growth spurt?