Contraceptives should be used on all conceivable occasions.
If we can get that realistic feminine morality working for us, if we can trust ourselves and so let women think and feel that an unwanted child or an oversize family is wrong — not ethically wrong, not against the rules, but morally wrong, all wrong, wrong like a thalidomide birth, wrong like taking a wrong step that will break your neck — if we can get feminine and human morality out from under the yoke of a dead ethic, then maybe we'll begin to get somewhere on the road that leads to survival.
It is now quite lawful for a Catholic woman to avoid pregnancy by a resort to mathematics, though she is still forbidden to resort to physics and chemistry.
No woman can call herself free who does not own and control her body. No woman can call herself free until she can choose consciously whether she will or will not be a mother.
The blind conviction that we have to do something about other people's reproductive behavior, and that we may have to do it whether they like it or not, derives from the assumption that the world belongs to us, who have so expertly depleted its resources, rather than to them, who have not.