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Two eggs failed to survive the thawing process. Three more failed to fertilize. That left six embryos, of which five appeared to be abnormal. The last one was implanted in her uterus. On the morning of March 7, she got the devastating news that it, too, had failed.

Adams was not pregnant, and her chances of carrying her genetic child had just dropped to near zero. She remembers screaming like “a wild animal,” throwing books, papers, her laptop — and collapsing to the ground.

It was one of the worst days of my life. There were so many emotions. I was sad. I was angry. I was ashamed

“It was one of the worst days of my life. There were so many emotions. I was sad. I was angry. I was ashamed,” she said. “I questioned, ‘Why me?’ ‘What did I do wrong?’ ”

In an age when egg freezing has become so popular that hip employers such as Apple and Facebook cover it as a perk and grandparents help finance the procedure as they might a down payment for a house, there’s surprisingly little discussion about what happens years later when women try to use them. Fertility companies tend to advertise egg freezing — “oocyte cryopreservation” — in scientific terms, as something that can “stop time.” And many women believe they are investing in an insurance policy for future babies.

But the math doesn’t always hold up. On average, a woman freezing 10 eggs at age 36 has a 30 to 60 percent chance of having a baby with them, according to published studies. The odds are higher for younger women, but they drop precipitously for older women. They also go up with the number of eggs stored (as does the cost). But the chance of success varies so wildly by individual that reproductive specialists say it’s nearly impossible to predict the outcome based on aggregate data.