My Eggs Were Mature—Why Didn’t They Fertilize? Understanding IVF Attrition

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You had 15 mature eggs and ended up with three embryos. What happened?

In this episode, Dr. Mark Amols explains IVF attrition: the step-by-step drop-off from eggs retrieved, to mature eggs, to normal fertilization, to blastocysts and beyond. Your final embryo count tells you how many chances you have. Where the drop-off happened tells you what to ask about next.

We cover:

• Why an MII (mature) egg is the starting line, not a guarantee
• Conventional IVF vs. ICSI, and what the evidence shows when sperm parameters are normal
• How rescue ICSI differs from planned ICSI
• Zymot, PICSI, and calcium ionophore: three tools for three different problems
• Lab benchmarks for fertilization and blastocyst rates, and why they aren’t a pass/fail line for one cycle
• The questions to ask your physician after a disappointing cycle

This episode completes our egg maturity series (Episodes 38–40).

This podcast is for education only and isn’t medical advice. Talk with your own physician about your care.

Thanks for listening to another episode of Taco Bout Fertility Tuesday with Dr. Mark Amols.

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Join us next Tuesday for another episode of Taco Bout Fertility Tuesday, where we make fertility medicine easier to understand—one topic at a time.