Ivf with down regging

Tuli • 39yo. Pregnant after 1st FET. Ttc since 05/16. 2 iui, 2nd ended in chemical. Cervical stenosis after lletz

I am due to start my estrogen pills

before <a href="https://glowing.com/glow-fertility-program">ivf</a> on day 21 (25 of Feb) then stop on the 5th of March. Then my first scan is on the 8th of March.

I read in the leaflet that at the scan they tell you when to start the injections, but does anyone know roughly when that could be? Is it likely to start on the 8th or much later?

Many thanks!