Benefits: 

FREE Welcome Box: A surprise box of items for parents and baby valued up to $35.
Universal Registry: Add any item from any site to your Amazon Registry using Universal Registry.
Completion Discount: Enjoy a 10% completion discount on items left on your registry. Prime members receive 15% off.
Earth's Biggest Selection: Amazon has millions of products to fill your house with all the right baby things.
Free 365-Day Returns: You have a full 365 days to return most items purchased from your registry.
Group Gifting: Allow multiple people to contribute towards bigger gifts by enabling group gifting.