Lott arrived six years after his parents began trying to conceive a child.

CNN: AllPolitics - TIME This Week

Ms. MURRAY: No more than if I had--you know, when were trying to conceive, that I might conceive a child that might have some medical problems.

NPR: Ethical Balance of Adopting a 'Snowflake' Embryo

Dr Johns believes that an optimistic frame of mind may lead to physical changes in the body that make it more likely that a woman will conceive a male child.

BBC: NEWS | Health | Optimists more likely to have boys

Anecdotal evidence shows that some couples who initially struggle to conceive and have a child by IVF or adoption, later fall pregnant naturally - possibly because the stress of the situation has been lifted.

BBC: NEWS | Health | Clues to stress-infertility link

Although the toddler will not be able to conceive naturally, she could carry a child created from a donated egg.

BBC: Sheffield mother to freeze eggs for infertile daughter