It is so the baby's head can fit through the mother when its ready to deliever. It's nothing to do with not eating the right amount of food.
10 weeks a baby has everything an adult has, just smaller...
For the first 8 weeks the developing human is called an embryo after that it is called a fetus.
The key word is appear, it might be that the scale has changed.
At 12 weeks of development, a fetus does not have the neurological development to feel pain.
the fetus will start kicking around 25 weeks
2 weeks
normally a fetus is 5.6 cm on average
fetus
29 weeks
Fetus
10 weeks