By the numbers: Royal births

Catherine, Duchess of Cambridge, is due to give birth in July to a baby who will be an heir to the British throne. Last month she made what's expected to be her last solo appearance before the birth, to christen a cruise ship. Here, ticker tape falls as Catherine officially names Princess Cruises' new ship Royal Princess in Southampton, England, on Thursday, June 13.

Capt. Tony Draper gives Catherine a tour on board the Princess Cruises ship on June 13 in Southampton, England.

The Duchess speaks with guests as she arrives at a garden party on the grounds of Buckingham Palace in London on May 22.

From left, Prince William, Duke of Cambridge, Prince Harry, and Catherine, Duchess of Cambridge, smile during the inauguration of Warner Bros. Studios Leavesden on Friday, April 26, in London.

Catherine speaks during a reception at the National Portrait Gallery on April 24 in London.

During a visit on April 23 to the Willows Primary School in Manchester, the Duchess plants a willow tree with comedian John Bishop to launch a new school counseling program.

Catherine attends the National Review of Queen's Scouts at Windsor Castle on April 21.

Rear Adm. Simon Robert Lister and Cmdr. Steve Garrett greet Catherine and her husband, Prince William, as they visit the Astute-class Submarine Building on April 5.

Catherine visits the Donald Dewar Leisure Center to launch a new project for their foundation on April 4 in Glasgow, Scotland.

To mark the 150th anniversary of the London Underground on March 20, the Duchess of Cambridge visits the Baker Street Underground Station, wearing a pin that reads, "Baby on Board!"

William and Catherine attend a St. Patrick's Day parade on March 17 in Aldershot, England.

Catherine sits next to a dummy of the ship's mate at the Skipper's Table during her tour of the National Fishing Heritage Center, in Grimsby, England.

On her first public engagement since early January, the Duchess talks with the trustee at Hope House residential center, run by Action on Addiction for recovering addicts, on February 19 in London.

Prince William shakes hands with artist Paul Emsley as Catherine looks on after viewing his new portrait of the Duchess during a private viewing at the National Portrait Gallery on January 11.

William and Catherine leave the King Edward VII Hospital three days after she was admitted for acute morning sickness. The hospitalization prompted the early announcement of her pregnancy.

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

• Prince William and the Duchess of Cambridge are expecting their first child soon


• Oddsmakers are taking bets on what the royal baby's name might be


• Is the baby more likely to be a boy or a girl? Catherine's health might provide a hint

(CNN) -- Prince William and his wife, Catherine, the Duchess of Cambridge, are expecting their first baby this month.

As the world awaits the arrival, here's a look at some interesting statistics and facts about royal births in Britain:

4 - The number of first names Prince Charles, Prince William and Prince Harry all have: Charles' full name is Charles Philip Arthur George Windsor, William's is William Arthur Philip Louis Windsor, and Harry's is Henry Charles Albert David Windsor.

The royal baby will probably have a lot of names, too, including the title prince (or princess) of Cambridge.

200 to 1 - The odds William and Catherine will name a girl Adele or Britney, or a boy Barack, according to oddsmakers at Ladbrokes.

5,000 to 1 - The odds they will choose North for the name, according to Ladbrokes. Too bad that has already been taken.

723,913 - Live births in England and Wales in 2011, the most recent year for which statistics are available from the Office for National Statistics.

Prince Willem-Alexander of the Netherlands, left, became King Willem-Alexander on April 30 after Princess Beatrix, center, abdicated the throne. Click through to see other European royal heirs.

Prince Felipe of Spain, center, will one day take up his father King Juan Carlos' title.

Prince Daniel, center, pictured with his wife Crown Princess Victoria, is the heir to King Carl Gustav of Sweden.

Norway's Crown Prince Haakon, left, and Crown Princess Mette-Marit, second left, are next in line behind King Harald and Queen Sonja.

Crown Prince Philippe, right, is the heir to King Albert II of Belgium.

Left to right: Denmark's Crown Princess Mary and Crown Prince Frederik are next in line behind Prince Consort Henrik and Queen Margrethe.

Photos: The royal lines

Bookies offer odds on royal baby

What will the UK's royal baby look like?

Guessing the royal baby's gender

1.34% - The chance of giving birth to twins in the United Kingdom, not counting in vitro fertilization.

50% - Greater likelihood that the royal baby is a girl, according to a study of women in Washington hospitalized for hyperemesis gravidarum. Catherine was hospitalized for this condition, which is essentially nausea that leads to vomiting and dehydration, in December 2012.

2,013 - Silver pennies coined by the Royal Mint, to be given to UK babies who are born on the same day as the royal heir.

32.6 - The average age of fathers for English and Welsh babies born in the year 2011.

31 - Prince William's age when the royal baby will be born. He turned 31 on June 21.

29.7 - The average age of mothers for English and Welsh babies born in 2011.

31 - Catherine's age when the royal baby will be born. Her birthday is January 9, and she is almost six months older than Prince William.

2 weeks - The length of Prince William's "statutory paternity leave," which is typical for an employee of the Royal Air Force.

7 pounds, 1.5 ounces - Prince William's birth weight.

103 - Years that passed between the births of a baby to a reigning monarch. Prince Andrew, Queen Elizabeth II's second son and third child, was born at Buckingham Palace on February 19, 1960. Queen Victoria's last child, Beatrice, was born in 1857.

3 of 4 - The number of children born at Buckingham Palace to Queen Elizabeth and Prince Philip. Charles, Andrew and Edward were born at the palace, while Anne was born at London's Clarence House in 1950.

8 - number of Queen Elizabeth's grandchildren.

8-8-88 - The birthday of Princess Beatrice, the elder daughter of Prince Andrew (August 8, 1988).

4 - The number of great-grandchildren Queen Elizabeth will soon have. Her grandson Peter Phillips and his wife, Autumn, have two children: Savannah (2010) and Isla (2012). Her granddaughter Zara Tindall, and Tindall's husband, Mike, recently announced Zara's pregnancy. Then there's William and Catherine's baby.

via CNN.com - Top Stories http://rss.cnn.com/~r/rss/cnn_topstories/~3/8mEoMRctkB8/index.html