BIRTH
Human beings procreate by sexual reproduction. The females of   our species give birth to new life. 
It takes nine months for a human fetus to fully develop in a mother’s womb. The fetus goes through a lot of changes during those 
nine months of pregnancy.When a baby is born, he leaves the mother’s body and begins breathing air on his own immediately. Your 
belly button is the leftover part of the umbilical cord that once fed you with nutrients from your mother!





How do we know what a fetus looks like inside the womb?
					
FETAL DEVELOPMENT
FIRST THREE MONTHS: The embryo grows from a shapeless lump of cells into a 
tiny version of a baby, complete with teeth, organs, and even a thumb that it sucks!
BY SIX MONTH: A fetus can hear and breathe air if it is born prematurely.
BY NINE MONTHS: The fetus develops finer motor skills, like the ability to grasp objects.







DEATH
The average life span for people living in developed countries is about 75 years (even higher for women). That’s up from 1900, 
when it was just 47 years! 
What gives – do we lead healthier lives now than back then? Well…not really.While we may have healthier diets than our great-grandparents, 
we also exercise less. Our longer life span probably has more to do with advances in medicine than with better eating.Before modern 
medicine, it was common for young kids and older people to die of basic infections and illnesses like the flu and pneumonia. Deaths 
during childbirth have decreased dramatically: infant mortality has gone 90 percent since 1900. And maternal mortality has decreased 
99 percent! Antibiotics and vaccinations do a lot to keep us healthy and fight off those nasty bacteria that try to make us sick. 
As science progresses, the average human life span continues to grow.