It's a well-known fact that Queen Elizabeth delivered all of her four children -- Prince Charles, Princess Anne, Prince Andrew and Prince Edward -- at home. The monarch was considered a trailblazer when it comes to birthing trends among the modern royals.

Queen Elizabeth was still a princess and young mom at 22 when she had her first child, Prince Charles, in 1948. According to Town and Country, the Queen had a Caesarean section inside a Buckingham Palace guest room, which was turned into a home hospital. 

The royal labored for more than 30 hours for her first delivery and Prince Philip even had time to play squash while awaiting news of his eldest son's birth. The Duke of Edinburgh handed his wife a bouquet of red roses and carnations when he learned of the delivery and outside, the bells of Westminster Abbey rang the happy news. 

Two years later, Princess Anne was born in August in Clarence House. Queen Elizabeth didn't give birth at Buckingham Palace during this time because it was under renovation.

Proud dad Prince Philip said that his daughter was "the sweetest girl" when he saw her for the first time. He then called up his father-in-law, King George VI, in Balmoral, to deliver the happy news while then-Princess Elizabeth had the Queen Mother as her first visitor. 

Prince Andrew was born in February, 10 years after Princess Anne, in Buckingham Palace. In the Netflix TV series The Crown, Queen Elizabeth's delivery of his birth was depicted with "twilight sleep." This birthing process was quite popular in the '60s, where the mother in labor was given an anesthetic while the baby was forced out using forceps.  But because it was a controversial procedure, Queen Elizabeth decided to deliver her youngest child, Prince Edward, in a different way.

Prince Edward was born in March 1964 in Buckingham Palace with the help of the Queen's surgeon-gynaecologist and a team of doctors, nurses and midwives. Prince Philip witnessed the birth of his child for the first time since Queen Elizabeth had been reading about involving the husband during childbirth. Royal biographers said that Prince Philip held his wife's hand through the whole labor and delivery. 

Royal birth trends have changed since then. The more modern royal moms, like Princess Diana, Kate Middleton and Meghan Markle, have opted to give birth at an actual hospital in London.