I have a 18 month old daughter; she was born before we were engaged (we were just friends who were too afraid to admit our feelings for each other... oh, and had sex).
I was told that I would not be able to get pregnant on my own (this was when I was with my ex-husband) due to the severity of my PCOS.
Things with the ex weren't that great so I wasn't too worried about the difficulty about having a baby.
Fast forward 3 years...
I'm pregnant. Oh, and I was 30 weeks along when I learned I was pregnant!!
Long story short; me getting pregnant wasn't something we planned on and seriously considered putting her up for adoption, but it's been the best thing to happen to us. And, we're talking about Baby #2 in the future - when Baby #1 is 3 years old, I'm going to come off the pill.
In a way, we started our relationship backwards: Baby, fall in-love (well, admit to each other that we were inlove with each other), get married, buy a house.
Sorry if the post is slightly off topic, just wanted to share what life can throw at you.