4th week
Cartilage
In an embryo, the skeleton is originally made of cartilage. This cartilage gradually mineralizes and ossifies into bone in a process called endochondral ossification.
Fetus
The same way that a human embryo or any other mammalian embryo does.
The embryo develops in the uterus of the mother.
If there was an actual embryo, it was not a false pregnancy.
Cartilage
The embryo of a human develops in the uterus of the female body. The uterus provides a protective and nourishing environment for the embryo to grow and develop into a fetus.
in her uterus
The first system to form in a human embryo is the nervous system. The neural tube, which will develop into the brain and spinal cord, is one of the earliest structures to develop in the developing embryo.
It is made up of mostly hyaline cartilage.
Embryo