I am so annoyed at my clinic - I was told I was 4 weeks last Monday.

The 1st day of my last period was the 13th of August, EPU was the 28th of august and transfer was the 31st of august.

NOW.. this is where it gets confusing, I think that I am 5 weeks 4 days today - using the 1st day of my last period.

The nurse at the clinic says they use the day of transfer or "conception date" which means I am 5 weeks exactly today and due on the 24th of May not the 20th of May!

Do they use this date because they know exactly when conception is???

How does your clinic pick your date??