It isn’t just Catholics who believe in the virgin birth. Most, if not all, Christians believe in the virgin birth. I was just making a distinction between the conception of Jesus and the conception of Mary. Many people make the same error, even some Catholics. The Feast of the Immaculate Conception is celebrated in the Roman Catholic Church on December 8th.
“The Immaculate Conception is commonly confused with the virgin birth of Jesus, the latter being, rather, the doctrine of the Incarnation. While virtually all Christians believe in the virgin birth of Jesus, it is principally Roman Catholics, along with various other Christian denominations, who believe in the doctrine of the Immaculate Conception.
“Although the belief that Mary was sinless, or conceived without original sin, has been widely held since Late Antiquity, the doctrine was not dogmatically defined in the Catholic Church until 1854 when Pope Pius IX, declared ex cathedra, i.e., using papal infallibility, in his papal bull Ineffabilis Deus, the Immaculate Conception to be doctrine. The Catholic Church celebrates the Solemnity of the Immaculate Conceptionon December 8; in many Catholic countries, it is a holy day of obligation or patronal feast, and in some a national public holiday.”
I was raised a Catholic and still remember a lot of the doctrine, though I’ve been an atheist all of my adult life. I did not realize until many years after I had left the church that the Immaculate Conception was a Catholic concept and not a part of most Protestant theologies.