A widow who is trying to stop her late husband's sperm being destroyed is taking her case to the High Court today.
Legal representatives of Beth Warren, 26, will ask a judge to rule on her challenge to a time limit imposed by the UK fertility regulator which means she has until April 2015 to conceive using the sample her husband placed in storage before dying.
Warren Brewer, a ski instructor, was 32 when he lost a long battle with cancer in February 2012.
Mr Brewer had signed consent forms allowing the storage of his sperm so Ms Warren could conceive after his death - known as post-mortem conception - but on a time-limited basis after which the samples are set to be destroyed.
Ms Warren, from Newport Pagnell, said coping with the personal trauma of her loss made it impossible for her to make any decisions about her future within the timescale, and wants it extended so she can make a choice in her own time.
However the Human Fertilisation and Embryology Authority (HFEA) has said it has "no discretion to extend the storage period beyond that to which her husband gave written consent".
Ms Warren said: "I'm exhausted but it's not a fight I can give up - Warren said he wanted to give me this chance. I need to do this."
The issue will now be determined by family division judge Mrs Justice Hogg.
Although the case is to be heard today, Ms Warren's solicitor, James Lawford Davies, said it was "unlikely" a ruling would immediately follow due to the case's complexity.