(Bloomberg) – Egg donation comes with health risks. Women are unable to learn which clinics have the fewest adverse outcomes.

For women in the US seeking fertility treatment or considering donating their eggs, there’s a fair amount of information they can find about any given clinic or hospital. They might look for data on how many egg retrievals the clinic has done or the ages of its patients. Many times they’ll want to know how often treatment resulted in the birth of a baby.

But one thing they won’t be able to find out is how often the procedure has gone wrong. That’s because while the Centers for Disease Control and Prevention discloses “success rates,” it keeps information about health complications under lock and key. (Read More)