I did! First, I wanted to for health reasons, because my endometriosis gets worse without it. (Which is why I am infertile).
Second, I feel like you cannot fully move on to adoption after infertility unless you have dealt with the pain and loss of infertility, and shut that door. We are simply done. That means, I am done grieving and I am done feeling the heartache of seeing negative pregnancy tests. That is just simply not how I am going to build our family, and it is liberating to know that! If I kept the door open on conceiving on our own, I will never heal from that. Will I change my mind in 5 years and do IVF again? Maybe. But I am not planning on it. I have fully shut the door to any more ttc, as I don't feel it's healthy for me and it really robs the adoption process of what it could be. Adoption, for me, is not plan b. It's not the backup plan if ttc fails, you know? I want to go all in, with guns a blazin', and I didn't feel I could do that by holding on to something that isn't going to happen for us.
Thirdly, a lot of agencies will not move forward with you if they know you are ttc, or if you get pregnant. For us, if I magically got pregnant, we would still pursue adoption, so it seems really stupid for me. I want to be a mom soon. I want to be a family. If a bio child happens in 10 yrs, that would be a blessing, but I am not going to put my life on hold for something that I cannot physically do. And I CAN be a mom now, through adoption.
That said, everyone is different. Your situation may not be mine, and your husband may not be ready to shut the door on ttc. You have to make that choice together, to a certain extent. Do you want to keep going through that? If you don't, maybe he doesn't realize how much you want to stop. I know my husband only got 100% on board with adoption when he saw how much pain I was in, and how I really really really wanted to stop ttc.