Would someone ever be permitted by the Catholic church to use a form of birth control?
These links should be helpful in understanding the difference between artificial birth control and natural family planning and when and why NFP is acceptable for a married couple to use to avoid pregnancy. If you have any further questions or concerns that are not answered by these links, please contact Catholic Answers directly.
Why is NFP okay?
What is the moral difference between contraception by artificial means and NFP?
If Onan was struck down for wasting his seed, why is NFP OK?
Contraceptives and Natural Family Planning
Must a couple have “grave reason” to use NFP?
Is NFP OK for birth control or only for spacing births?
Birth Control from the Catholic Answers Library
God, Sex, and Babies by Christopher West
Love, Sex, and Babies by Jason Evert
Good News About Sex and Marriage by Christopher West (book)