Did you know?
The biggest challenge with using donated embryos is to agree on logistics as to which clinic is responsible for treatment.
Embryo donors also have to register with the Human Fertilisation and Embryology Authority (HFEA) and complete goodwill messages.
No one knows for sure when the first embryo donation took place but the term was first used in the mid-1980s.
The first successful frozen embryo transfer resulted in twins in 1987.