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COPENHAGEN, DENMARK - JANUARY 17: Crown Princess Mary (L) visits in her capacity as protector the "Copenhagen Baby Heart" project at the Government Hospital ("Rigshospitalet") the Clinical Biochemical Department where chief physician Ruth Rikke-Smith explains about new research based upon analysis of blood from baby's umbilical cord on January 17 in Copenhagen, Denmark. (Photo by Ole Jensen - Corbis/Corbis via Getty Images)

COPENHAGEN, DENMARK - JANUARY 17:  Crown Princess Mary (L) visits in her capacity as protector the  "Copenhagen Baby Heart" project at the Government Hospital ("Rigshospitalet") the Clinical Biochemical  Department where chief physician Ruth Rikke-Smith explains about new research based upon analysis of blood from baby's umbilical cord on January 17 in Copenhagen, Denmark.  (Photo by Ole Jensen - Corbis/Corbis via Getty Images)

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COPENHAGEN, DENMARK - JANUARY 17: Crown Princess Mary (C) is welcomed by Anne Kaltoft, chair the Danish Heart Association, to the "Copenhagen Baby Heart" project at the Government Hospital ("Rigshospitalet") on January 17 in Copenhagen, Denmark. The project is a two years screening where all parents are offered an ultrasound scanning of their newborn child and some 30.000 baby's are expected to be scanned. The most common congenital diseases is heart disease and the purpose with this project is to clarify the benefit of early heart screening. Crown Princess Mary is protector of The Danish Heart Association, which is co-organizer of the project. (Photo by Ole Jensen - Corbis/Corbis via Getty Images)

COPENHAGEN, DENMARK - JANUARY 17:  Crown Princess Mary (C) is welcomed by Anne Kaltoft, chair the Danish Heart Association, to the  "Copenhagen Baby Heart" project at the Government Hospital ("Rigshospitalet") on January 17 in Copenhagen, Denmark. The project is a two years screening where all parents are offered an ultrasound scanning of their newborn child and some 30.000 baby's are expected to be scanned. The most common congenital diseases is  heart disease and the purpose with this project is to clarify the benefit of early heart screening. Crown Princess Mary is protector of The Danish Heart Association, which is co-organizer of the project.  (Photo by Ole Jensen - Corbis/Corbis via Getty Images)

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COPENHAGEN, DENMARK - JANUARY 17: Crown Princess Mary (C) visits in her capacity as protector the "Copenhagen Baby Heart" project at the Government Hospital ("Rigshospitalet") on January 17 in Copenhagen, Denmark. The project is a two years screening where all parents are offered an ultrasound scanning of their newborn child and some 30.000 baby's are expected to be scanned. The most common congenital diseases is heart disease and the purpose with this project is to clarify the benefit of early heart screening. Crown Princess Mary is protector of The Danish Heart Association, which is co-organizer of the project. (Photo by Ole Jensen - Corbis/Corbis via Getty Images)

COPENHAGEN, DENMARK - JANUARY 17:  Crown Princess Mary (C) visits in her capacity as protector the  "Copenhagen Baby Heart" project at the Government Hospital ("Rigshospitalet") on January 17 in Copenhagen, Denmark. The project is a two years screening where all parents are offered an ultrasound scanning of their newborn child and some 30.000 baby's are expected to be scanned. The most common congenital diseases is  heart disease and the purpose with this project is to clarify the benefit of early heart screening. Crown Princess Mary is protector of The Danish Heart Association, which is co-organizer of the project.  (Photo by Ole Jensen - Corbis/Corbis via Getty Images)

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COPENHAGEN, DENMARK - JANUARY 17: Crown Princess Mary during her visit at the "Copenhagen Baby Heart" project at the Government Hospital ("Rigshospitalet") on January 17 in Copenhagen, Denmark. The project is a two years screening where all parents are offered an ultrasound scanning of their newborn child and some 30.000 baby's are expected to be scanned. The most common congenital diseases is heart disease and the purpose with this project is to clarify the benefit of early heart screening. Crown Princess Mary is protector of The Danish Heart Association, which is co-organizer of the project. (Photo by Ole Jensen - Corbis/Corbis via Getty Images)

COPENHAGEN, DENMARK - JANUARY 17:  Crown Princess Mary during her visit at the "Copenhagen Baby Heart" project at the Government Hospital ("Rigshospitalet") on January 17 in Copenhagen, Denmark. The project is a two years screening where all parents are offered an ultrasound scanning of their newborn child and some 30.000 baby's are expected to be scanned. The most common congenital diseases is  heart disease and the purpose with this project is to clarify the benefit of early heart screening. Crown Princess Mary is protector of The Danish Heart Association, which is co-organizer of the project.  (Photo by Ole Jensen - Corbis/Corbis via Getty Images)

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COPENHAGEN, DENMARK - JANUARY 17: Crown Princess Mary (C) visits in her capacity as protector the "Copenhagen Baby Heart" project at the Government Hospital ("Rigshospitalet") and is received by Sophie Haestrup Andersen (L) , chair the Regional Council for Copenhagen, and Anne Kaltoft, chair the Danish Heart Association, on January 17 in Copenhagen, Denmark. The project is a two years screening where all parents are offered an ultrasound scanning of their newborn child and some 30.000 baby's are expected to be scanned. The most common congenital diseases is heart disease and the purpose with this project is to clarify the benefit of early heart screening. Crown Princess Mary is protector of The Danish Heart Association, which is co-organizer of the project. (Photo by Ole Jensen - Corbis/Corbis via Getty Images)

COPENHAGEN, DENMARK - JANUARY 17:  Crown Princess Mary (C) visits in her capacity as protector the  "Copenhagen Baby Heart" project at the Government Hospital ("Rigshospitalet") and is received by Sophie Haestrup Andersen (L) , chair the Regional Council for Copenhagen, and Anne Kaltoft, chair the Danish Heart Association,  on January 17 in Copenhagen, Denmark. The project is a two years screening where all parents are offered an ultrasound scanning of their newborn child and some 30.000 baby's are expected to be scanned. The most common congenital diseases is  heart disease and the purpose with this project is to clarify the benefit of early heart screening. Crown Princess Mary is protector of The Danish Heart Association, which is co-organizer of the project.  (Photo by Ole Jensen - Corbis/Corbis via Getty Images)