Hail Full of Grace!

In the Constitution Ineffabilis Deus of 8 December, 1854, Pius IX pronounced and defined that the Blessed Virgin Mary "in the first instance of her conception, by a singular privilege and grace granted by God, in view of the merits of Jesus Christ, the Saviour of the human race, was preserved exempt from all stain of original sin." [1]

St. Bernadette was the daughter of François Soubirous, a miller, and his wife Louise, a laundress, and was the eldest of five children who survived infancy. Bernadette's impoverished family lived in a single unheated room. On 11 February 1858, Bernadette, then aged 14, was out gathering firewood and bones with her sister and a friend at the grotto of Massabielle outside Lourdes, when she had an experience that completely changed her life and the town of Lourdes where she had lived. It was on this day that Bernadette claimed she had the first of 18 visions of what she termed "a small young lady" standing in a niche in the rock. 

During one of her visions, she asked the woman her name but the lady just smiled back. She repeated the question three more times and finally heard the lady say, "I am the Immaculate Conception" Four years earlier, Pope Pius IX had defined the dogma of the Immaculate Conception.  Her parents, teachers and priests all later testified that she had never previously heard the expression 'immaculate conception' from them. [2]

Full of Grace…

Source 1, Source 2