As Jon commented, we covered the topic in the Christianity.StackExchange Blog last year. I took the Catholic position on the subject but will now attempt to conjure up anti-birth control hermeneutic that even folks who consider Catholicism to be yet another brand of Christianity might consider plausible.
First, the non-existence of explicit references to the regulation of birth as something universally condemned along with the other 613 commandments using the most complicated algorithms to search the text of the Bible, the Deuterocanonicals and the Apocrypha might lead you to think that Birth Control is amoral. But, what it should really do is make you question it's existence. Birth Control is a clearly a euphemism, and an evil one at that.
The name of Birth-Control, for instance, is sheer nonsense. Everybody has always exercised birth-control; even when they were so paradoxical as to permit the process to end in a birth. Everybody has always known about birth-control, even if it took the wild and unthinkable form of self-control. The question at issue concerns different forms of birth-prevention;
G.K. Chesterton – On Evil Euphemisms
As a euphemism, it's not something that actually exists. What does exist are its antithets
Birth is in the Bible, hundreds of people including [Jesus] were born in the Bible. Cursing ones birth:
Keep your father and mother in mind when you sit among the mighty, Lest in their presence you commit a blunder and disgrace your upbringing, By wishing you had never been born or cursing the day of your birth.
Sirach 23:14 NABRE
is not a good thing. Jeremiah and Job, started out lamenting:
because he did not kill me in the womb! Then my mother would have been my grave, her womb confining me forever. Why did I come forth from the womb, to see sorrow and pain, to end my days in shame?
Why did I not die at birth, come forth from the womb and expire?
But Job and Jeremiah found out that it's better to be born because life, including suffering, is a great mystery and it connects us to Christ.
Then Jesus said to his disciples, “Whoever wishes to come after me must deny himself, take up his cross, and follow me.
The self denial which makes us followers of Christ leads to Chesterton's second point about self-control.
For this very reason, make every effort to supplement your faith with virtue, virtue with knowledge, knowledge with self-control, self-control with endurance, endurance with devotion, devotion with mutual affection, mutual affection with love. If these are yours and increase in abundance, they will keep you from being idle or unfruitful in the knowledge of our Lord Jesus Christ.
2 Peter 1:6
and all these virtues, borne of faith in Christ, blossom in their fullness in the context of a marriage that always is open to God's creative power.
The above mentioned verse is a veritable blueprint for Natural Family Planning. It starts with Faith in God's providence, it goes on to knowledge about the natural systems that regulate ovulation then requires self-control during fertile periods and the endurance to be continent month after month followed by a devotion to one another and to Christ and a deepening love between all members of the family!