Are menstruating women considered ritually impure in Christianity? In certain religions, women are considered as ritually impure during their menstrual cycles. They are asked not to participate in sacred rituals etc during those times.

Is it the same in Christianity? Are menstruating women considered ritually impure in Christianity?

Please cite from the Holy scriptures to prove your claims.
Ritual purity is a familiar concept in Christianity due to its importance to the Israelite sacrificial system as described in the Old Testament. The vast majority of Christian churches however do not believe that this kind of physical ritual purity applies to Christianity. Ritual purity is understood to have been a physical metaphor for the spiritual purity which is required of Christians. The words of Jesus in Matthew 15 are the clearest place to see how Christians understand this:

Matt 15:10-11, 16-20 (NIV): Jesus called the crowd to him and said, “Listen and understand. What goes into someone’s mouth does not defile them, but what comes out of their mouth, that is what defiles them.”
“Are you still so dull?” Jesus asked them. “Don’t you see that whatever enters the mouth goes into the stomach and then out of the body? But the things that come out of a person’s mouth come from the heart, and these defile them. For out of the heart come evil thoughts—murder, adultery, sexual immorality, theft, false testimony, slander. These are what defile a person; but eating with unwashed hands does not defile them.”

The Christian sacrament of baptism can be seen as the last vestige of ritual purity for most Christians: this ritual is performed once as an initiating rite into the church, symbolising the complete and lasting purity which they receive from Christ through the gospel.
One exception is the Ethiopian Orthodox Tewahedo Church, which maintains many of the Jewish laws, and does prohibit menstruating women from entering the church.