That God says or wills it, is not a guarantee for its manifestation. You must play your part. Abraham used hospitality to get Isaac. Hannah used a vow to get Samuel. God gave Jesus for the prophecy of salvation to come to pass. I know a lot of women who became fertile by washing the toilets in their local assembly.
My father and my God, reveal to me what I need to do for your prophetic words over my life to manifest, in Jesus Name