The ARC in Palm Springs said the explosion occurred in the car park near its building.
The fertility clinic said their lab, including all eggs and embryos, remained "fully secure and undamaged".
"We are heavily conducting a complete safety inspection and have confirmed that our operations and sensitive medical areas were not impacted by the blast," the clinic said in its statement.
But Dr Maher Abdallah, who runs the clinic, told the Associated Press that the clinic's office was damaged.
"I really have no clue what happened," he said. "Thank God today happened to be a day that we have no patients."
https://www.bbc.com/news/articles/cyvme1e8gd5o