EMBRYOLOGICS
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Ten questions worth asking about the lab before you start

Most patients never speak to the embryologist. These are the questions that tell you how a lab works — and that a good lab will be glad to answer.

Clinical review pending·4 min read·Updated 2026-08-16·

Patients meet doctors and nurses; the laboratory stays behind a hatch. Yet the lab does the work that most decides the outcome once the eggs are collected. You are entitled to understand it. These questions are polite, reasonable, and revealing — not because of the exact numbers, but because of whether the clinic has answers.

About the people

  1. Who runs the lab, and what are their qualifications? Look for a named senior embryologist with recognised certification and years of hands-on experience. Ask how many embryologists there are per cycle load.
  2. Who will do my ICSI / biopsy / vitrification? Skilled procedures are person-dependent. It's fair to ask about experience.

About the numbers

  1. What is your fertilisation rate? Blastocyst rate? Post-thaw survival? A good lab tracks these monthly and can tell you the range. Rough healthy answers: fertilisation around 70–80% (ICSI), blastocyst 40–60% of fertilised eggs, survival after warming above 95%. Exact numbers matter less than the fact that they know them.
  2. How do you review those numbers, and how often? "Every month, against benchmarks, and we investigate dips" is the answer you want.
  3. Do you take part in any external quality scheme or accreditation? Not every good lab does, but it shows the habit of being checked.

About safety

  1. How do you make sure the right eggs, sperm and embryos are together? Every step should be double-checked by a second person or an electronic witnessing system, and they should be able to describe it without hesitation.
  2. How are your incubators and storage tanks monitored? Daily checks, alarms, back-up power and back-up tanks. Ask what happens at 2 a.m. if an alarm goes off.
  3. What are your policies on freeze-all, single embryo transfer, and day-5 culture? These reveal how modern the practice is.

About you

  1. Can I have a copy of my embryology report — how many eggs, mature, fertilised, day-3, blastocysts, and their grades? You should be able to. Keep it; it's the most useful record you'll have if you move clinics.
  2. Can I speak to the embryologist if I have questions about my embryos? Many clinics will arrange a short conversation. Even a "yes, through the nurse" is a good sign.

No lab is perfect and no answer is a guarantee. But a clinic that welcomes these questions is a clinic that is already asking them of itself — and that is what quality in a lab actually looks like.

If you're the clinic reading this

Feel free to print this page for your patients — the questions are ones a well-run lab is proud to answer, and asking them builds the trust that carries patients through a hard process. Our free tools for labs exist to make the honest answers easy to have.

This page is educational and general. It is not a substitute for advice from your own clinic or the manufacturer's instructions for use.