Anyone Can Procreate...

In Genesis, man is given the commission to go forth and multiply.

Gen 1:28 LITV
(28) And God blessed them; and God said to them, Be fruitful and multiply, and fill the earth, and subdue it, and rule over the fish of the seas, and over birds of the heavens, and over all beasts creeping on the earth.

That was before man sinned, however. Once he did, things got a little more difficult. There was soil to till and were animals to chase. Sweaty work. But along came the Promised Land, which brought more options.

Deu 8:1 LITV
(1) You shall take heed to do every commandment which I am commanding you today, so that you may live and may multiply and may go in and possess the land which Jehovah has sworn to your fathers.

Now we can go forth, multiply, and possess! That's really a reversion to 'taking dominion' again. When Jesus says He has given us the keys to the Kingdom, He means that the right is given to us to take ground - we must simply take action. We lost dominion, but He regained it for us if we'll take it. By following His commands we can step into our destiny.

Jesus Himself follows this pattern. He overcame death and claimed the keys of hell itself when He died and rose. This was the price paid by a Kinsman Redeemer to recover what was lost. But He has not officially retaken possession of His physical Kingdom - yet. He will when He begins to open the seals of the deed (read Revelation).