I am guessing you wanted a girl.
Here's the thing. For most people, having babies the regular way, you would just be done with it - end of discussion at 41.
You'd be so thankful for your healthy baby. If I had brought up another baby to my husband at 4 months, he would have gotten in car, and driven off.
I am guessing you want a girl because you brought it in previous question. Am I correct? I'm not judging, I just think you'd get more helpful answers on here.
Here's how it worked here for us.
My husband was asked by the doctor if he wanted to be on the vasectomy wait list (because I did not ask to have my tubes tied and they do that so you have time to think about it - they just make it off in the distance). So he said sure. When his call for appointment came up, I said "I don't think I'm ready to make that decision" and he said "Ok" and he cancelled it. Didn't mean I knew for sure I wanted more kids. We just agreed we wouldn't shut that door.
So that's how we handled it.
Can you not just shelf the idea for the next while? I get you're 41 but why not wait for 6 months or so? Can you do that? I couldn't make this decision at 6 months after having a baby. I was still getting my baby to sleep.
I knew I was done when I had no interest in being pregnant any more. I was enjoying the raising our children phase and had no desire to go back to the infant phase. We (as a family) were ready to move on fully.