I had always wanted 4.
I had some complications during delivery w/ our first (DD) which scared DH, so, 18 months later, when older DS came along & ended up in the NICU right after he was born (but, very thankfully, is completely fine now), DH was done. A little girl & a little boy exactly 18 months apart... we were good. Nice & even!
Every now & then I'd say something like, "Maybe we should have one more..." DD & older DS are so close in age that I felt like I was done w/ each stage in one fell swoop, if that makes sense. Baby stage... done. Toddler stage... done. But it just never felt right.
And, by the time older DS was 5, I was content & didn't really want that much of an age gap between the older 2 & a baby. Plus, I was getting older.
Well, when older DS was 8 & DD was 9... surprise!! A new baby boy!!
Now we have 3... DD, older DS, & younger DS. I absolutely cannot imagine our lives w/o younger DS.
And now we feel complete.