I got married in 1975 at 18 years old. Although the big A was some influence in my decision, I decided I did not want to have children for 5 years since I did marry young. So I went on the pill. I wanted any children I brought into this world to have a house and good parental guidance AND better than a janitor's income. (I married a janitor who later became an electrician).
Well, 5 years into the marriage, we were both out of JWdom, and our relationship was soooo bad that there was no way I was going to bring a child into that! (Both of us alcoholics and him very violent) My husband kept nagging me that if I had a baby everything would be all right. Ha! I no way in hell was going to believe that lie.
Edited to add: As it was I tried to commit suicide by russian roulette because I didn't "believe" in divorce (after considering homocide). If I had children, staying with him would have killed me.
At 7 years I finally had the courage to divorce him.
I had my tubes tied at 30 because I was unmarried and on a career path in the software industry. I couldn't see myself having children in those next 5 years, and since I was raised by an older couple that were more like grandparents, I did not want to be raising a baby in my 40's.
Have I regretted it? Yes. I have mourned not having children. I also believe it is the best thing I never did! I've had so much karma to work on in this life that having children would have detracted from my necessary journey and enlightenment.