IVF & Fertility Jan 2026

Embryo development: from fertilisation to transfer

What happens in the laboratory during the days between egg collection and embryo transfer.

After egg collection, fertilisation takes place in the laboratory. This is the beginning of embryo development — a process that typically unfolds over five to six days before a transfer decision is made.

A clearer path through treatment

Each fertility experience differs significantly. A collaborative care team merges medical knowledge with attentive listening, enabling patients to comprehend their options while prioritizing their security, health, and personal objectives.

Embryologists monitor development carefully at each stage, assessing cell division, quality and the eventual formation of a blastocyst. The goal is to identify the embryo or embryos most likely to result in a successful pregnancy.

With the right information and support, families can move forward at their own pace and make decisions that feel informed, respectful and right for them.

Questions to ask before choosing an IVF clinic ›