Is postponing conception by agreement between spouses, without using medication, for the sake of stability and bearing expenses, considered a sin or forbidden?

Procreation is one of the greatest objectives of marriage, and it is a shared right of both spouses. Neither of them may prevent the other from it without their consent. It is not permissible, even with their consent, to use anything that would completely prevent it. However, agreeing to postpone it for a period of time or to regulate it for a benefit is permissible.