Wow, my girls were 4lbs 12oz and 4lbs 13oz at birth and were born natually, but we didn't know it was twins until they were delivered. My daughter gave birth to twins in March by C-section and they were 5lb 9oz and 7lbs and 2oz and she is 5'4" and her normal weight is 130lbs so needless to say she was very uncomfortable at the end