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week 1
the menstraul period is the start of the pregnancy -
week 2
- 3 to 10 eggs receive a hormonal signal that tells them to mature and preovulate -the uterus blood linning becomes thicker
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week 3
- the egg travels down the fallopian tube -sperm must travel to the fallopian tube to penetrate the egg
- the eggs becomes fertilize
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week 4
- egg begins to divide and float down to the uterus -then immedicately it becomes fertilized
- the sperm determines the gender
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week 5
-amniotic fluid builds up
-embryo starts growing
-once it doubles in size, mucous covers the egg
-the placenta starts to develope
-the embryo starts to receive oxygen and nutrients -
week 6
- the embryo continues to grow -the spinial cord begins to close -blood cells and blood vessels start to develope -the heart is forming -the brain divides into 5 parts -the eyes, arms, and legs begin to develope
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week 7
- embryo continues to grow
- the heart starts to beat with one chamber
- the dividing cell walls form
- arm and leg buds begin to grow
- lower jaw and vocal cord start forming
- mouth starts to open
- ears begin to form
- lung, liver, pancreas, and thyroid gland start forming
- digestive tract starts to develope
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week 8
- elbows and toes are visible
- feet and hand buds haced appeared
- starts to practice moving
- face begining to shape
- teeth begin to devlope -stomach begin made a part from the gut
- mouth and nostrils are forming
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week 9
- cartliage and bone are forming
- upper lip and nose starts to develope
- tongue and larnyx developing
- eyelids are forming but remain close
- construction of the heart is complete
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week 10
- from now on, it is known as a fetus
- neck begins to form
- fetus is starting to wriggle and shift
- the jaw is in place
- you can see finger prints indented into the skin
- hair is forming
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week 11
- fingers and toes are completely separate
- taste buds are developing
- cartilage is turning into bone
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week 12
- fetus starts moving like crazy
- pancreas starts producing insulin
- nails are forming
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week 13
- ribs are starting to appear
- nose and chin are defined
- learning to suck its thumbs
- mouth can open and close
- possible to tell the gender
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week 14
- eyes move towards the center of the face
- ears are fully developed
- first hair is appearing
- kidneys are producing urine
- if girl, ovaries move towards the pelvic
- if boy, prostate gland is developing
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week 15
- skin is very thin
- it can make a fist
- finger nails and toes nails are presented
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week 16
- its covered with a protective soft down to regulate temperature
- fat begins to form underneath the skin
- can hear external voices
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week 17
- the umbilical cord grows thicker and stronger
- its sensitive to light
- first stools begin to accumulate
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week 18
- skin builds a protective wax layer
- hears sounds
- recognizable rest periods
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week 19
- placenta grows and nourishes the baby
- heart beat is visible during the ultrasound
- genetials are distinct and recognizable
- scalp hair begins to sprout and grow
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week 20
- midpoint of pregnancy
- fetus can hear and recognize mother's voice
- mother will feel movement
- growth of hair and body has started
- skin is getting thicker
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week 21
- bone marrow starts forming blood cells
- small intestine aborbs sugar
- fat is being added to the body
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week 22
- reacts to loud noises
- starts to sleep and wake up regularly
- taste buds form on the tongue
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week 23
- eye brows are visible
- bone harden in the ears
- can successfully suck
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week 24
- starts gaining about 3 ounces
- eyelids can be seen
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week 25
- bones become solid
- hands are fully developed
- brain grows rapidly
- sexual organs are fully developed
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week 26
- hands are very active
- eyes begin to open
- feet are 2 inches long
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week 27
- hearing continues to develope
- eyes are blinking
- head is over 2.5 inches
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week 28
- eyes move into the sockets
- teeth develope under the gums
- hair on the head is visible
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week 29
- brain developes neurons muscles
- lungs continue to mature
- fetus can taste and respond to pain
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week 30
- wrinkles on the skin become smooth
- able to control body temperature -if boy, testicles move towards the groin
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week 31
- eyes completely open and respond to light and dark
- loud noises can cause it to jump
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week 32
- fat layer is getting thicker
- toes and finger nails are completely formed
- if boy, testicles desend from groin to scrotum
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week 33
-Fuzz and lanugo dissapear
-Drinks a pint of amniotic fluid a day
-Mother gains a pound per week
-1/2 of weight goes to the baby -
week 34
-Now excellent chance of survival out of womb
-Eyes can open and close
Fat accumulation plumps the arms and legs -
week 35
-Reflexes are coordinated
-90% of babies born this week survive
-Lungs almost fully developed
-Growing fat due to fat layer developing -
week 36
-May feel contractions
-Becomes chubby as fat layer builds -
week 37
-Water can now break -
week 38
-Soft down is dissapearing
-reaches final birth position
-Typically born head first -
week 39
-Punching and kicking continues in lower abdomen -
week 40
-Delivery time
-All of the systems are ready to go
-Contractions can occur at any time