Female altar servers
The development of the ministry of altar server has a long history. In the early Church, many ministries were held by men and women. By the early Middle Ages, some of these ministries were formalized under the term "minor orders" and (along with the diaconate) used as steps to priestly ordination. One of the minor orders was the office of acolyte. Altar servers are a substitute for an instituted acolyte.
In several Christian Churches, women have traditionally been excluded from approaching the altar during the liturgy. Thus The Service Book of the Orthodox Church (English translation by Isabel Florence Hapgood) states that "no woman may enter the Sanctuary at any time". In the Roman Rite of the Catholic Church, the former rule was: "women may not enter [the sanctuary] at all".
This did not exclude women, especially in convents of nuns, from entering the altar area at other times, for cleaning.
In Eastern Churches, women are further restricted by not being allowed inside the altar area and in several traditions even within the church building during their monthly periods.