What does the author realize about motherhood after becoming a mother herself as mentioned in the Introduction in the book, Dear Ijeawele, or A Feminist Manifesto in Fifteen Suggestions?

Adichie realizes how easy it is for a woman without a child to give advice. Women without children may not be faced with the enormously complex reality of being a woman. She implies that their is an experiential perspective from a woman who has gone through motherhood and one who has only witnessed it.