How does having a baby change you?

Ok guys lately, I’ve been grappling with feelings of stagnation, often described as a midlife crisis. Recently, my partner and I learned that we are expecting a child. This news has prompted me to reflect on the potential impact of parenthood. For the parents here, How did the arrival of your child influence your life? and In what ways did becoming a parent affect your sense of purpose and fulfillment?

I would greatly appreciate your insights and experiences.