The Immaculate Conception, a solemnity celebrated on December 8, is the patronal feast of the United States. In 1854, Pope Pius IX's solemn declaration, Ineffabilis Deus (link al documento que está en ...

"The most Blessed Virgin Mary was, from the first moment of her conception, by a singular grace and privilege of almighty God and by virtue of the merits of Jesus Christ, Savior of the human race, ...

A twin pregnancy is identified by two fetuses in the uterus at the same time. Prenatal visits should happen more often with twin pregnancies because of higher risk. Most twin pregnancies are ...

The average pregnancy lasts about 40 weeks from conception to delivery. Female fertility is highest between the late teens and late 20s. About 10 to 20 in 100 known pregnancies end in miscarriage. It ...