Why do I need to retrieve more than one egg to hopefully have a baby later on?

Since a baby grows out of just one fertilized egg cell, it seems counterintuitive that you’d have to freeze more than one egg to increase your likelihood that your frozen eggs will result in a baby. However, while eggs seem to survive the freezing and subsequent warming relatively well, the actual IVF procedure tends to be a lot less efficient. You can think of the process from freezing an egg to implanting it in your uterus as a funnel that gets narrower:

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