"Nothing can describe the feeling. You have the instant connection once you know your child is growing inside you, but when you hold it for the first time, the words can't be found. It's an old cliche that the thing expectant mums look forward to the most is holding their child in their arms for the first time, but it's one of those cliches that is a real truth." Beyonce describes her reaction to the birth of her baby daughter Blue.