Catholics around the world — who are already observing the first week of the Advent season — mark the Solemnity of the Immaculate Conception on Thursday, Dec. 8, a day that signifies the conception of ...

For many, the doctrine of the Immaculate Conception is the hardest to believe of all the Church’s teachings. The idea of Mary having been completely sinless can be hard to believe and even ...

In the past, the obligation to attend Mass on a transferred holy day of obligation was not transferred along with the feast day when it fell on a Monday. A firefighter in Rome pays tribute to the ...

Conception occurs when sperm fertilizes an egg found in the fallopian tube, creating a zygote that can eventually become an embryo. Conception — and ultimately, pregnancy — can involve a surprisingly ...

How does a baby develop inside the womb? Fox News looks at the various stages of development from conception to birth. Pregnancy tends to follow a well-understood and predictable course. But according ...

The doctrine of the Immaculate Conception teaches that Mary, the mother of Christ, was conceived without sin. The doctrine of the Immaculate Conception teaches that Mary, the mother of Christ, was ...