"megha-ganne"

The 17-year-old New Jersey based amateur has now shot rounds of 67-71-72 for a total of three-under 210 and is four shots behind the leader Lexi Thompson (66)

On Thursday, Ganne, 17, emerged as the first amateur in 15 years -- the last was Jane Park in 2006 to lead the US Women's Open after the first round.