The club said that Aditi, who has represented the under-19 Indian national women's team at AFC Qualifiers in Malaysia, was a late addition to their squad during pre-season.
Chauhan's football journey kicked off when her school coach asked her to participate in Delhi under-19 team trials.
She was appreciated for her contribution to India winning the South Asian Football Federation (SAFF) women's cup in 2013.
West Ham's senior men's team is a regular at England's top-flight football, the EPL.
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"Great news for Indian football! West Ham have signed Indian int'l goalkeeper Aditi Chauhan for their ladies team," West Ham Ladies tweeted yesterday.
"CHAUHAN: Plenty of love on Twitter today for our new Indian international goalkeeper @aditi03chauhan from back home in India! Hi all! #COY," the club added today.
Aditi tweeted, "Thank you all for the overwhelming response and wishes. I will work hard to make this opportunity count @westhamladies.