-
Period: to
Zygote
-
Period: to
Embryo
-
Heart beats regularly. Eyes and ears begin to form.
4 week old embryo -
Heart develops right and left chambers.
8 week old embryo -
Period: to
Fetus
-
Infant begins to crawl.
7 months old -
Eyelids can open and weight can be up to 6.6 pounds.
6 to 9 month old fetus -
Bones are visible. Heartbeat can be heard with a stethoscope.
4 to 6 month old fetus -
Fingerprints form.
6 month old fetus -
Period: to
Infancy
-
A baby can hold its head up and reach for objects.
3 months old -
Period: to
Childhood
-
Started Preschool
When I was 3 years old I started Preschool. This was very exciting for me. I got to meet new people and made new friends. -
Started Kindergarten
When I was 4 I started kindergarten. This was even more exciting for me because I was beginning elementary school. I got to meet my new teachers and they got to meet me. -
Ovulation in females, and sperm production in males begin.
Age 9 to 15 -
Period: to
Puberty
-
Started 5th grade
When I was 10 I started 5th grade. This was very important to me because after fifth grade I was going to middle school. I also had made new friends. -
Went to Lousiana
I got to go to Louisiana when I was 9. This was awesome. I was going to a brand new state to be with my family for a holiday. This was like one of the best days of my life. -
Started 6th grade
. When I was 11 I started 6th grade. This was my first year in middle school and I went to a new school. This was very scary because I walked into a brand new school and with brand new people. -
Period: to
Adolescene
-
Period: to
Adulthood
-
Skin starts to become wrinkled.
Age 30 -
Aging begins.
Age 30 -
Aging becomes more noticeable and progresses rapidly.
Age 45 to 60