The Latest: California fertility clinic adding safeguards

CLEVELAND (AP) — The Latest on the equipment failures at fertility clinics in California and Ohio (all times Eastern):

2 p.m.

The president of a California fertility clinic where thousands of frozen eggs and embryos may have been damaged says the problem was "immediately rectified" by a worker who refilled a low nitrogen tank.

Dr. Carl Herbert is president of Pacific Fertility Clinic in San Francisco. He tells ABC News in an interview released Monday that a senior embryologist noticed the nitrogen level in one tank was very low during a routine check March 4.

Herbert says the embryos were later transferred to a new tank. He says the clinic is sending letters to about 500 patients "that may have been involved in this tank."

He says the clinic has put in place more failsafe measures to prevent a repeat.

The failure came the same day as one at a Cleveland-area clinic where officials estimate about 2,000 frozen eggs and embryos may have been damaged by a similar storage malfunction.

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7:30 a.m.

An Ohio family has filed a class action lawsuit against the hospital where officials estimate about 2,000 frozen eggs and embryos may have been damaged by a storage tank malfunction.

Amber and Elliott Ash, of Bay Village, say they had two embryos stored at University Hospitals Cleveland Medical Center's suburban fertility clinic after Elliott's cancer diagnosis in 2003. The couple has a 2-year-old son conceived through in-vitro fertilization, and hoped to bring him a genetic sibling.

The couple says their embryos are now no longer viable.

The hospital issued an apology after the unexplained malfunction caused temperatures inside the storage tank to rise. UH officials say the lawsuit will not affect an ongoing independent review into the malfunction.

The Ash family is seeking an undisclosed amount in damages.