Lining check before transfer

Melissa

I have an ultrasound next Friday the check my lining before transfer on the 30th. The ultrasound will be 7 days before the transfer and I believe I will start PIO 6 days before. I know I want 8,9 or higher for transfer but,

My question is...what should I expect my lining to be at for that ultrasound? At 7 days prior to transfer? And will the 3 lines be seen a week before? TIA.