Fertility Glossary

Failed fertilisation

When no eggs fertilise after insemination or injection.

Total failed fertilisation is uncommon and deeply disappointing. Causes include egg or sperm factors; ICSI, or in some cases artificial egg activation, may be considered in a future cycle.

Related terms

Fertilisation

The joining of egg and sperm to form an embryo.

ICSI

A single sperm is injected directly into an egg during IVF.

Cancelled cycle

A treatment cycle stopped before egg collection or transfer.

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