The scientific way would be buying a few eggs to inseminate and place in an artificial womb. Then you figure out how to keep the specimen alive (artificial placenta) and lastly you need to figure out how to speed up the cell division process and make it age faster untill it has a body age of about 16 depending on preference. Lastly while your future gf is growing you will need to playback alot of speech and learning vidoes at higher speeds then regular, assuming you method of speeding up aging speeds up brain development too. And voila, a healthy human specimen for you to mate with and be your companion.
