I stopped at three, but as the second and third are twins, it's the same (ish)
I had a hysterectomy due to cervical cancer at thirty three. I was bereft as felt like I'd never gotten it right iyswim... Never planned my babies with someone who wanted them, I'd never had a nice time during either pregnancy. My 1st one I was eighteen and the shame of the family, as I fell pregnant whilst studying at a very posh school I'd won a scholarship to
and had a fucking horrid time as my family were awful, and I was in a very ea relationship, which is a whole other story, so I ended up a single parent. Eight years later, my partner of five years left me for another woman and in my devastation, I had a fling with a fantastically sexy hot young man (I was 27 he 23) and fell pregnant with twins in the space of three weeks, and one night up a mountain in andalusia 
He was livid, and although he has since grown up an awful lot, and adores his children, who he sees three nights a week,we were never really 'together' as a couple, and certainly never planned to have the dcs.
When they were 6 I was single (I had remained single since that preg) but had my hysterectomy, and at that point I grieved terribly as I felt truly robbed of the chance to do things properly with a man who wanted children with me. That was compounded when I met dp, who is a truly amazing man, who I love and we're planning on marrying next year. When we first got serious I grieved all over again for the fact I couldn't give him the children I thought he deserved. He has always maintained he didn't want to have kids - and is delighted with mine.
I'm thirty six now, and have well and truly accepted the childbearing years are over. I do think biology plays a massive part in how I felt, and once I passed some crucial point, my broodiness has wained entirely. I really enjoy the fact that at 36 I have an almost 18 year old, who is very independent and a lovely young man, and the twins are nine now, and physically the hard work is over with them - they are easy at this age!
I recently took on some temporary work to help out a friend, looking after twin baby girls, and I was soooo glad when it was over. In fact, I now feel like, I don't actually like children (obvs apart from my own who are perfect
)
Who would have thought it?