IX. (8) Their disbelief in the resurrection of the body has been already condemned by the Church.
Their eighth point is that the formation of men's bodies is the device of the devil, and that the seed of conception is shaped by the aid of demons in the wombs of women: and that for this reason the resurrection of the flesh is not to be believed because the stuff of which the body is made is not consistent with the dignity of the soul. This falsehood is without doubt the devil's work, and such monstrous opinions are the devices of demons who do not mould men in women's bellies, but concoct such errors in heretics' hearts. This unclean poison which flows especially from the fount of the Manichæan wickedness has been already arraigned and condemned by the Catholic Faith.
Source: Letters (New Advent)