If your opinion were correct, Swedish women (who live in a country noted for its many parenting-friendly laws & social programs), for instance, would have more babies than, say, impoverished women in impoverished countries, for better-off women would have less to fear from motherhood, planned or unplanned. (But the fact of the matter is that they don't.) Generally speaking, the higher women's status, educational level, earning capacity relative to men, etc. are in a society, the less willing women are to give birth to babies. Also, historically, in America, for example, as women have come closer to gaining treatment equal to men, women have come to prefer a smaller and smaller number of children. Women's well-being has a reciprocal relation to a smaller number of children.
Yoshie