Is it permissible to delay conception to avoid one's children consuming usury, and is conception permissible in light of usurious dealings?

It is impermissible to obtain a credit card with interest (riba), and whoever has done so must repent and cease dealing with it, because dealing with usury is unlawful. If a husband feeds his wife and children from a usurious loan, this is not forbidden for them, especially if they are compelled to do so. There is no harm in delaying conception if a person is experiencing financial hardship, fearing expansion into unlawful earnings.