Why is "She" used in the Douay-Rheims translation of Genesis 3:15? So this portion of scripture is very famous and important, its called the "proto-evangelum". It is often counted as the first spoken promise of salvation from God to man. 

Here is the verse in a modern english version


  I will put enmity between you and the woman,
      and between your offspring[a] and her offspring;
  he shall bruise your head,
      and you shall bruise his heel.” (ESV)


I was reading another question on this site, https://christianity.stackexchange.com/a/64450/36043

This question quoted this very familiar verse, but with a minor, but serious difference. 


  "I will put enmities between thee and the woman, and thy seed and her seed: she shall crush thy head, and thou shalt lie in wait for her heel. " Genesis 3:15 (Douay-Rheims)


This version says that "SHE" shall crush the serpents head, while every version I have seen always says "he".

This is a very serious discrepancy. The post referenced included a painting of Mary, a song about Mary, a prayer to Mary, and the poster mentioned he/she liked the song included because  "The song also emphasize Mary's role in salvation beuatifully in a very simple way."

So, if one is coming from that perspective, this verse would certainly lend some credence to Mary veneration. So I see why someone who holds that disposition would like this translation.

As for a criterium for the answer to this question, answering any of these questions will be enough.


Why does this translation use "She"?
Do other reliable translations render it this way?
If not, why the discrepency?
Any related historical information, or tie in to catholic/protestent doctrines about Mary would be a fun plus.
From an edition of the Douay-Rheims Bible online I found this:

[15]I will put enmities between thee and the woman, and thy seed and her seed: she shall crush thy head, and thou shalt lie in wait for her heel.
[15] &quot;She shall crush&quot;: Ipsa, the woman; so divers of the fathers read this place, conformably to the Latin: others read it ipsum, viz., the seed. The sense is the same: for it is by her seed, Jesus Christ, that the woman crushes the serpent's head.

And from the same source we have the Latin...

[15] Inimicitias ponam inter te et mulierem, et semen tuum et semen illius : ipsa conteret caput tuum, et tu insidiaberis calcaneo ejus.

So, it says &quot;she&quot; because of the Latin &quot;ipsa&quot; which according to Google translate means &quot;she.&quot;
I have a favorite metaphor when talking about things like the Holy Ghost and Jesus Christ.  Who delivers your mail?  The post office or the postman?  The answer is &quot;yes&quot; because both do, the former having the authority and responsibility to ensure the mail is delivered and the later the duty to put it in your mailbox.
From the perspective of Eve, the only woman standing on the planet at that time, whether you specify &quot;he&quot; in relation to her Son or &quot;she&quot; in relation to her, the consequence remains the same: the defeat of Lucifer.