The Latin abbreviations i.e. and e.g. are often confused. Used incorrectly, they achieve the exact opposite of the writer's intention, which is to appear learned by marshaling a Latin phrase for an English one not all that much bigger.
Most dogs are pregnant for between 58 days and 64 days. The due date varies slightly depending on the breed and size of dog as well as the size of the litter she is carrying, but vast majority of dogs will give birth on the 63rd day. If you know the date your female dog mated, you can count 63 days from that date
Many times, your dog may birth 2 to 4 pups, then take several hours before she gets back around to delivering any more. Though Golden Retrievers are notorious for taking a very long time to give birth, they can sometimes surprise you. One of my dogs gave birth to 9 puppies in 2 hours, start to finish. That is a bit unusual though. When whelping puppies, it is normal for your Golden Retriever to birth many of her babies tail first, rather than head first. This is called a breech birth and is quite common and nothing to worry about.