Estrace during IUI?

Alie
Has anyone taken estrace during their <a href="https://glowing.com/glow-fertility-program">IUI</a> cycle? Did it work for your lining? What CDs did you take it? I'm on my third <a href="https://glowing.com/glow-fertility-program">IUI</a> cycle and my lining is disapppinting every time. First cycle was 5.6 at trigger, second cycle was 6 (chemical pregnancy) and today at CD 9 my lining was only 3mm. My doctor has never suggested estrace but after reading I want to at least ask about it. I'm not sure what the downside of taking it is. This is the last <a href="https://glowing.com/glow-fertility-program">IUI</a> we will do so I want to make sure we can do all we can.