This morning it looking like things were moving along well, with a "beautiful" lining of 6.5 and a follicle at 16.2 mm. However, the phone call this afternoon announced that I would not be coming in for another ultrasound tomorrow, but for my IUI. "Already?" I said. "Already", they confirmed. My HCG Pregnyl shot tonight at 8pm, and then the IUI tomorrow at 12:30.
Now I know my ovulation date, I can take a look at how my response stacks up against the other IUIs. And my endometrium measurements fit right over the other ones. No matter if I ovulate at day 9 or day 16, my lining is always around 7 mm, one standard deviation below my clinic's average of 8.7 mm ± 1.59. My lining is a consistent under-achiever.