Because the brain has to grow.
In week 9 the fetus begins to develop fingernails and body hair. By week 13 fine hairs begin to grow on the head.
In a fetus, the head is relatively larger compared to the body in the early stages of development. As the fetus grows, the body catches up in size. By the time of birth, the head and body proportions are more balanced.
Because
The biggest part of the fetus is the head/brain..
It isn't. The rest of the body is small.
Head to toe of the fetus is parallel to the ground Head to toe of the fetus is parallel to the ground
Microcephaly is an extremely rare condition in which the fetus's head circumference is lower then one percentile.
The baby changes position to prepare for delivery. It is safest for the fetus to come out headfirst; this is the way the body naturally is designed.
A fetus' head that is in the 99th percentile is not necessarily bad, but it may indicate a problem. A large head can indicate that the child has extra fluid on the brain, which is a serious condition.
Some anthropologists believe that the different species of head and body lice developed in response to humans' invention and use of clothing about 50,000 years ago.
Footling breech-- A position of the fetus while in the uterus where the feet of the fetus are nearest the cervix and will be the first part of the fetus to exit the uterus, with the head of the fetus being the last part to exit the uterus.
The head