Ochoa confirmed her status as the best in the world

The Mexican world number one shared the lead with Norway's Suzann Pettersen at the start of the final round.

Ochoa broke clear with two birdies in the first three holes and fired a six-under-par 66 to finish on 18 under.

South Korea's Kim Mi-hyun birdied the last two to secure second with a 69 but Pettersen finished fifth on 12 under.

"I have been trying to get my seventh victory of this year but it has been tough the last two weeks," said Ochoa.

"This week has been great and I am very proud and happy with this trophy."

Ochoa hit every green in regulation on the front nine to reach the turn three under par.

She set up further birdies at the 10th and 14th before rolling in a 15-footer from the edge of the green at the 15th to surge four clear.

Although the world number one bogeyed the par-three 16th after missing her only green of the day, she immediately recovered with the seventh birdie of her round at the 17th.

Pettersen stayed in touch with birdies at the seventh and eighth before losing ground around the turn.

American teenager Michelle Wie ended a frustrating week with a six-birdie 71, which lifted her one place off the bottom of the leaderboard in the elite field of 20.

Final leaderboard: