well if you do not know the answer ,I(that means me)can tell you the answer.the answer is that they form cells,then the cells between your fingers die.
describe the fetus
It will develop walking.
The fetus' heart beats eighteen days after conception.
The eyelashes of a fetus develop around week 22 of pregnancy.
A female fetus with an a y chromosome is what makes it develop differently from a male fetus.
The female fetus has a Y chromosome while the fetus only has two x chromosome.
The Gonads
lungs
The Heart.
it is not something you develop you are born with it
UterusD
12 weeks