Embryology: what happens in the IVF laboratory?

What does an embryologist do?

Embryologists handle eggs, sperm and embryos during assisted reproduction. In an IVF cycle, the laboratory team prepares the samples, checks fertilisation and observes embryo development before transfer or freezing.

How are IVF and ICSI different in the laboratory?

With conventional IVF, eggs and sperm are brought together in the laboratory. With ICSI, an embryologist injects one sperm into an egg. Your specialist should explain why a particular method is recommended.

What should I ask about embryo development?

Ask the team to explain the number of eggs collected, how many fertilised and how many embryos remain suitable for the next stage. These are different points in the process. An update about fertilisation does not confirm a pregnancy.

Planning transfer and freezing

The team will discuss which embryos may be suitable for transfer or storage. Ask what the laboratory report means for the next decision, including whether to transfer in the current cycle or plan a frozen embryo transfer.

• When should I expect laboratory updates?
• Who can explain my embryology report?
• What are the options if no embryos are suitable for transfer?
• How will the transfer and storage decisions be recorded?

Questions about embryology