What's the shortest luteal phase you can fall pregnant with?

[blakesmummy09]

Hi does anyone know the shortest it can be as my last one was 9 days and this one looks as it if might only last 8 days of af arrives at the same time

 

[junemomma09]

I have a short luteal phase but I'm not sure. You need enough time for the egg to implant. It takes 6-12 days i believe. So depending how long it takes the egg to travel to the uterus and then implant and how long your LP is. I was placed on progesterone supplement to help lengthen mine. Hope this helps!