From Chapter II of her 1920 book Woman and the New Race, she states the following:
So, too, with woman’s struggle for emancipation. Women in all lands and all ages have instinctively desired family limitation. Usually this desire has been laid to economic pressure. Frequently the pressure has existed, but the driving force behind woman’s aspiration toward freedom has lain deeper. It has asserted itself among the rich and among the poor, among the intelligent and the unintelligent. It has been manifested in such horrors as infanticide, child abandonment and abortion.