Greetings, Pilgrim.

To be more specific, all protestant churches opposed all forms of contraception until the Anglican church's Seventh Lambeth Conference in the 1930's in which contraceptives were allowed in a limited capacity. This lead to many other Protestant churches to follow suit until there was no sigificant opposition to contraception of any kind except abortion. The main argument from Protestants was from scripture citing the example of Onan who God punished for spilling his seed on the ground rather than to honor his familial obligation. The founders of Protestantism seemed to be of like mind:

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"[T]he exceedingly foul deed of Onan, the basest of wretches . . . is a most disgraceful sin. It is far more atrocious than incest and adultery. We call it unchastity, yes, a sodomitic sin. For Onan goes in to her—that is, he lies with her and copulates—and, when it comes to the point of insemination, spills the semen, lest the woman conceive. Surely at such a time the order of nature established by God in procreation should be followed. Accordingly, it was a most disgraceful crime. . . . Consequently, he deserved to be killed by God. He committed an evil deed. Therefore, God punished him" --Martin Luther

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"The voluntary spilling of semen outside of intercourse between man and woman is a monstrous thing. Deliberately to withdraw from coitus in order that semen may fall on the ground is doubly monstrous. For this is to extinguish the hope of the race and to kill before he is born the hoped-for offspring" --John Calvin

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"Onan, though he consented to marry the widow, yet to the great abuse of his own body, of the wife he had married, and the memory of the brother that was gone, refused to raise of seed to his brother. Those sins that dishonor the body and defile it are very displeasing to God and evidences of vile affections. Observe, the thing which he did displeased the Lord—and it is to be feared; thousands, especially of single persons, by this very thing, still displease the Lord and destroy their own souls" --John Wesley

Of all Protestant traditions, the orthodox Amish and Lutherans seem to be the only ones actively opposed to contraception. In the case of the Amish, even the Catholic practice of calendar planning is prohibited. And now, thanks to you, I can gladly add to that list traditional, historic Reformed and Calvinist Baptist churches.

Liberalism -- Ideas so good, they have to be mandated.