If you are asking where foxes have babies, the short answer is that foxes give birth in a natal den, a sheltered place chosen for safety, warmth, and privacy.
For a baby fox, that den is the first home. Baby foxes in a litter spend their earliest weeks there, hidden from weather and predators.

Most red foxes use dens only during the breeding season, not year-round. The exact spot can vary from a hollow burrow to a tucked-away space under a shed or deck.
The mother fox usually chooses a secure den close to food and cover so she can nurse her litter with as little disturbance as possible.
Where Foxes Choose To Give Birth

A fox den is not just a resting spot. Foxes use it as the birth site for a litter.
Foxes often pick a location that offers hidden access and dry ground. Enough cover allows the mother to move in and out without drawing attention.
Natural Burrows And Sheltered Ground
In the wild, foxes often build dens in burrows, banks, or patches of ground with good drainage.
A red fox may use an abandoned burrow or enlarge and shape one to fit the litter. A vixen commonly renovates an old earth rather than digging every den from scratch.
Under Sheds, Decks, And Other Human Structures
Foxes adapt well around people.
If a yard offers quiet access and shelter, a den may appear under a shed, deck, porch, or brush pile. These spots feel secure to a fox because they provide overhead cover and a hidden entrance.
Why A Natal Den Is Different From Other Fox Dens
A natal den is the birth den and serves a special purpose.
Other dens may be used for resting, escape, or temporary shelter, while the natal den is lined and prepared for newborns. The mother usually chooses it for privacy, safety, and steady conditions during the first weeks of life.
When Denning Happens And Who Uses The Den

Foxes begin denning during the breeding season, then use the den fully when the litter arrives.
A vixen prepares the den. The male fox helps support the family.
The dog fox may spend much of his time bringing food and guarding the area while the fox kits are tiny.
Breeding Season And Spring Births
Foxes usually mate in winter. Births often happen from February through April.
The short pregnancy means spring births are common for many red foxes, which gives the young a better chance when food becomes easier to find.
The Vixen’s Role Before And After Birth
The vixen chooses and prepares the birth site before giving birth.
After the litter arrives, she stays close to the den, nurses the young, and keeps the fox kits warm and protected while they are still helpless.
How The Male Supports The Litter
The male fox, also called the dog fox, often brings food to the den area and helps keep watch.
His support matters most when the mother is nursing and cannot travel far. That extra help lets the vixen spend more time with the litter during the earliest stages.
What Happens Inside And Around The Den

Inside the den, life starts small and quiet.
Newborns depend on their mother for warmth and milk. As they grow, they gradually become active fox cubs and curious baby foxes that spend more time near the entrance before venturing out.
How Newborn Kits Start Life
Newborn fox kits are blind, fragile, and completely dependent on the mother.
They stay tucked inside the den, nursing and sleeping while their bodies grow stronger. Early life is mostly about warmth, safety, and steady feeding.
When Fox Cubs First Emerge
A fox cub usually starts peeking outside after a few weeks, when eyes open and legs are steadier.
At first, the young stay close to the entrance so they can retreat fast if they sense danger. Those first outings are short and cautious.
When A Mother Moves Her Young
A mother moves her young if the den becomes disturbed, too dirty, or less secure.
Foxes often change dens during the season, especially as the litter grows and the family needs more space.
As the kits become more active, the den serves as a base rather than a permanent nursery.