Yes, with my first. My husband had just reunited after being seperated for about 5 months... and it was about our two year anniversery at that time... we had always said after 2 years we'd try. So we decided to try, the very first month we tried we got pregnant. At first I was concerned though... because we had started trying and then I started bleeding lightly and I thought "oh man, I started my period"... but unlike my other periods, it didn't get heavier, and only lasted 3-4 days, it was just light pink, AND one week before I was due to start my period, also without the cramping. I was suspicious so I got a home pregnancy test and sure enough it was positive. Turns out it was what they call "implantation bleeding" which usually occurs how mine did.
With our second we tried for 2-3 months because we had the exact time planned to have her (of course didn't know what the gender would be at the time)... and without luck. When we decided to stop trying, that's when we got pregnant.. we decided we wouldn't actively try, but wouldn't try to use pull out method either. You see, when we were "trying" I'd wait till I knew I'd be ovulating.. and it didn't take. When it actually happened and I got pregnant it was a few days before I was due to ovulate. I found out later that this is what you should actually do before you get pregnant, to do it a few days before your due to ovulate. With my third it was 5 days before we were due to ovulate... and I didn't know this information until after this... we weren't trying to get pregnant, and I didn't think I'd be fertile yet... it wasn't until afterwards that I read an article on it or something and that helped me piece together why we didn't get pregnant when we wanted with our second.
With the current pregnancy, I had just stopped breast feeding my at the time 7 month old, had my first normal period, and it HURT! let me tell you, probably the heaviest I'd had. And we didn't plan on having any more kids, I had an appointment to get on birthcontrol. Anyways, once again I was calculating according to my cycle, but didn't take into account though it had previously been a regular 28 day cycle... that since I had stopped breast feeding, it would be irregular. So, just before I was due to begin my period, which is usually not a fertile time, atleast not for us, we decided to not use any kind of birth control methods. Shortly after this, instead of beginning my period like I expected, I began having ovulation symptoms... and then I thought "hmmm, uh oh... I shouldn't be ovulating right now... maybe my cycle wasn't regular
"... yep, sure enough, got pregnant, but it was meant to be, I'm sure of it!
I used this post as an opportunity to talk about my conceptions, hope you don't mind, I like to share that info. Hope it helps.
HB
he was born exactly nine months after marriage. he was a week early. it happened right away for us. now i am expecting #2 in oct. 
