Baby husky bullet is the first-ever puppy to receive a life-saving injection for cancer.
It has now been named after the late tech billionaire and co-founder of SpaceX.
Musk, who was diagnosed with stage 4 glioblastoma in January 2017, gave birth to a boy last week.
The baby’s name is Baby Bullet.
“He was born with a life expectancy of around seven months,” said Musk in a statement to CBC News.
“We are just thrilled to have him as a part of our family.
We will be doing everything in our power to keep him healthy and active for as long as he can live.
The family is so grateful and proud of him and we will keep him alive through this difficult time.”
The baby, who weighed just 1.3 kilograms when he was born, is expected to live about two months.
Musk has been working to find ways to reduce the impact of his disease and raise money for research.
“His prognosis is very good and I think he’s just going to get better,” Musk told CBC News last week, when he revealed that the baby was the first puppy in the world to receive the new injection.
The company has raised more than $40 million in private and public funding since the announcement, including $6.7 million from the Canadian government.
“I don’t know how many people have done this before and how many of them have gotten to this point and that they have been able to raise the money to do it,” Musk said in an interview last month.
The news of the new baby came as Musk and his wife, Sheryl Sandberg, are under fire for their social media posts that criticized women who don’t wear heels.
Musk is known for taking a more aggressive stance against sexism in tech.
The new baby will be Musk’s second child with wife Sheryl, after his first daughter, Sasha.