Grown man
We just want to make this clear that no matter what you do, no one will ever give birth to a full-grown adult. It just will not happen, you can not skip the small-child phase and go straight into having an adult human being who understands society as a whole.
Babies need to grow up slowly and learn the ropes of how everything is done in this world. Imagine if they just came out like this, then we would lose all the wonderful moments we experience with kids and the world would just be a giant club. That doesn’t sound too bad actually.