A total of seven Swedes are in the starting field for the tournament that kicked off in Houston, USA, on Thursday.
Both Maja Stark and Linnea Ström finished the first round at -3 and ended the day in a tie for eighth place.
Linn Grant finished at -2 and is in a tie for 18th place.
American Nelly Korda has a lead of -7.
Grant did not get any relief and was forced to withdraw from the most recent tournament due to stomach pain, according to Helsingborgs Dagblad.
Grant was diagnosed with endometriosis two years ago and was forced to withdraw from an LPGA tournament in North Las Vegas three weeks ago due to stomach pain.
Maja Stark won the US Open last year.
