DC3 - when did you know you wanted a 3rd?

[WobblyPig]

I have a DS 3 and DD 5 months. There are very many good reaons why I would/could not have a 3rd. My age ; 2 c-s; cost ; my employers; childcare arrangements and many people have warned me against 3 for many mroe reasons. BUT - I can't get a third out of my head and I ma not sure why.

For those who have 3 or more - when did you know that you wanted more than 2 ?
What practical problems did you experience?

Always knew i wanted 'more than one' but never how many. DD now at school and Ds will be 2.

Am now pregnant with no4 (but lost no2 at 20 weeks) and can't wait. I've already had 2 cs and my consultant has no problems doing a 3rd.

DH talks about another to even it out(already) but this is my last.....i think