I have never felt the desire to have children. I come from a culture (Mexican) where the life cycle of a woman is to be born, grow up, get married, have children, die.
Due to life circumstances, I moved to Germany almost 8 years ago. This allowed me to distance myself from my culture and really question the idea of having children. It was when I realized that it was more of a social imposition than something I wanted for my life.
Being clear about that answer has made me question other things, so well related to culture (if motherhood defines me as a woman, for example). Little by little I manage to be at peace with the social and family burden of my decision. Personal peace of mind remains constant, and I am grateful for that.