At the age of two, Mackenzie Stephens is many years away from even thinking about starting a family of her own. But her mother already wants to take steps to make sure it can happen – even though her daughter will never be able to have children in the normal way. Penny Jarvis wants to freeze her own eggs so that Mackenzie, who was born without ovaries, can use them to have babies by IVF. If this happened, the ethical implications would be immense. The test-tube baby would be a half-sibling of its birth mother as well as another child of its grandmother. The baby’s father would be fertilising his mother-in-law’s egg. In addition the baby’s aunts and uncles would also be its half-brothers and sisters. Despite these factors Miss Jarvis, 25, who has four other children, is determined to give Mackenzie the chance of motherhood. At the family home in Sheffield, she said: ‘You could look at it as her giving birth to her own brother or sister, but I choose not to see it like that. You do the best for your children and Mackenzie’s daughter or son would be her own. (MailOnline)