"[N]either the wisest constitution nor the wisest laws will secure the liberty and happiness of a people whose manners are universally corrupt." -- Samuel Adams
Emergency Contraception / Morning-After Pill
High dose birth control pill regimens (estrogen or progesterone) used shortly after intercourse. Effect: if fertilization has not taken place yet, within the moments from fertilization until the regime is taken, EC may act as a true contraceptive and block fertilization; more likely, there has been no fertilization, and therefore, no effect; or, if fertilization has occurred, the effect may cause an early abortion ["pre-implantation effect"]. Long-term effect on the female body of such high dose hormones is not known.
Birth Control 
