I think what she's asking is, from the time your ovary releases the egg, how long until your body reabsorbs it if it isn't fertilized.
I think an egg is viable for about 36 hours. I'm probably wrong. But a day or two, roughly. That's why I always advise women to start having sex a day or two
before they ovulate, and every day (or every other, if your man has a low sperm count) until your fertile window is closed. This guarantees that there will be
lots of fresh sperm in your body at all times, and gives you a higher chance of having the little swimmers in position when your egg is descending.