This prohibition in the East is true, though it is not strictly adhered to in the last century or so. There is also prohibition of a woman attending church until the forthieth day after giving birth (there are special blessing at theis time, as well as a service for “rechurching” the mother in the services books). This is all directly related and received from Jewish tradition. There is another prohibition that is very strictly adhered to everywhere in the Byzantine East i have seen or heard of-if anyone is bleeding, he cannot even be in the Altar (the area behind the Ikonstas/chancel screen, or, if you prefer, the altar rail). He/she cannot receive the Eucharist. So if the priest should cut himself during Liturgy, he must immediately leave the Altar until he stops. Originally this had to do with uncleanliness issues, but in the Christian acceptance of this point of Torah, it became an issue of holiness-the sanctity of blood, the source of life, cannot be in the presence of the Sanctity of Blood, the Source of Life (the former being our blood, the latter being Our Lord’s precious and Life-giving Blood).
In Christ,
Adam