I was 19, the ex was 18. Our reason was we were too lazy to use condoms after we got married.
I am ever so glad I was lazy of course. 
Baby is due 16 days after my birthday and 2 days after hubby’s. So, if he’s born on time, I’ll be 32 and my husband will be 33.
24 for my first, 26 for my second. My ex was 29 and 31, respectively.
I was four months shy of 30 when our first child was born. (Mr. Kiminy had just turned 28.) We had been married for three years, and lived together for two years before that. We both wanted kids even going into the marriage, but I was in grad school, and knew that I would be going to France for a year as part of grad school. We got married before going to France, he went with me and spent a year as a “househusband” since he couldn’t get a work permit, then we came home and got pregnant.
Second child came three years later, after one miscarriage.
I was 20 with the first, my beloved Bluesman was 25. We had been married all of 6 weeks when our son made his appearance. 22/27 with #2, and 24/29 with #3. We are now 38/44, and no, there will be no more.
I was 26 when my unplanned surprise made his debut. I never had any more.
I’m sure there will be more unplanned pregnancies in many ladies’ futures now that they’ve put “The Sponge” back on the market. 
26 for our first although we lost an earlier one to a miscarriage. 41 for the last one.
I was 24 when I got married and 25 when my wife suggested trying for a baby. A couple of times before then I’d said “There’s plenty of time, let’s wait” etc, but when she became more persistent I just said okay. As it happens it saved my marriage, imo. I don’t think we’d have made it if we hadn’t had our daughter to focus on and force us to grow up. She’s now almost four, and we’ve been trying for another baby for about a year. My wife had an ectopic pregnancy in January and lost one of her fallopian tubes, which will mean conceiving might take a bit longer, but we should be okay in the end.
We had kids earlier than most people we know. Earlier in our marriage and in our lives, actually. I think I just went with the idea because I wanted her to be happy, y’know, to have what she wanted. And I always wanted kids anyway.
Married at 21, had our first daughter 11 months later when I was 22. Next child was 2 years later at 24. At 29, we had a “surprise” in our 3rd child - I was wearing a spermicidal condom, she had an insert going on…so, a barrier and a chemical. We just figured she was a child very determined to get here…(of course, she’s my favorite…sshhhhhhhh - don’t tell the other two )
First baby I was 29 and he was 31, second baby I was 31, he was 34. We started trying for a baby a little after one year of marriage, and for the second one to time them about 2.5 years apart. Both times I got knocked up first month trying.
40…after eight years of unsuccessful trying and IVF therapy.
hmm… so far, I’m the oldest for having a first child.
We were 26 when we started trying because we felt ready. We’re now 29 and no closer now than we were then. I feel disappointed that we didn’t try earlier because I suspect the problems that have cropped up now were not as severe just a year or two before but I guess we’ll never know. We’re extremely disappointed that we’re not going to have kids before we’re thirty.
I’m 34, she’s 33; and this our first pregnancy.
I feel VERY FUCKING LUCKY because I took a lot of stupid chances in my youth.
I don’t think I could have planned it better.
A few weeks over 30. I had gotten out of grad school with a real job and real money not that long before. No waiting - best we can tell we hit it the first time. (Go sperm! 
) My wife did her graduate work in reproductive physiology, so she had her pride to consider also.
I got married at 21 my first husband, but he himself was enough of a child that more children were unnecessary, the marriage didn’t last too long. I didn’t marry Brainiac4 until I was 28. About six months after getting married we started trying to have children, spent a year without help, another year with help and another year adopting.
I’m hoping to be 26 when our first is born, but it ain’t lookin’ so good. We’ve been trying for a year with no luck whatsoever.
I was 24 with my first.
With my husband, we had twins later so
Mr NVME was 32
I was 27
19 for the first, then 21, 22, and 25. Add a year to get my husband’s age.
I was 17 when my first was born, 19 when my second was born and 22 with the last. Their dad was 25, 27 and 30.
I was 20 when I had son number one. Second son came along when I was 23. My final contribution to the human race, another son, came along when I was 31.
I could make up a lot of reasons on why I had the first two so young or the last one so much later, but it all boils down to “it seemed like the right thing to do at the time”.