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Conception
Egg is inseminated
One Sperm successfully penetrates the egg
Occurs two weeks from the first day of the last menstrual period also when the due date is determined
24 hours- first division -
1st month (Weeks 4-6)
Week 4-
size of a poppy seed
cells migrate to an area forming 3 layers that will become:
Top layer- the neural tube (brain, backbone, spinal cord, and nerves)
Middle Layer- skeleton and muscles grow also heart and circulatory systems will form
3rd layer- lungs, intestines, and urinary system form
The embryo is surrounded by amniotic sac
Week 5-
The heart is the first organ to develop and function
Week 6-
Size of a lintel
Heart is divided into the 4 chambers and beats at 150 BPM -
1st Month (Week 6)
Week 6 cont. -
Baby's head is lager than the trunk of its body
Facial features are forming with dark spots where the eyes, nostrils, ears will form
Vocal cords and tongue are forming as well as the arms and legs
Week 7-
Size of a blueberry
Tiny tail that is the tailbone (coccyx) this will disappear
Cartilage is forming between the limbs
Arms and other limbs become lengthened
The brain grows a third
Ears are developing as well as teeth -
2nd Month (Weeks 8-10)
Week 8-
End of embryonic stage
Size of a kidney bean
Facial features are more defined
Nerve cells are forming neural pathways
Part responsible for scent is taking shape
Arms and legs are lengthened
Ankles, thighs, knees and toes are not as defined
embryonic tail is almost gone
Week 9-
Begins looking more human
Size of a grape
Earlobes are defined
Hair follicles form
Taste buds form on the tongue
bulb shaped buds form under the gums which are milk teeth
Week 10-
Size of a green olive -
2nd Month (Weeks 10-12)
Week 10 cont.-
Forehead is temporarily bulging
Eyelids are fused shut and will not open until week 27
Fully developed heart
Baby has fingers and nails, and it's arms and legs can rotate
Stomach muscles are taking shape
The yolk is beginning to shrink
Week 11-
Size of a fig
Mouth is almost formed
Bones are beginning to fuse
Week 12-
Size of a lime
Bone is beginning to develop from cartilage -
4th Month (Weeks 19 and 20)
Week 19-
Size of a heirloom tomato
Arms and legs are proportional
brain is forming special areas for scenes
Baby continues to move
Week 20-
Length of a banana
Halfway to due date -
3rd Month (Weeks 13 -15)
Week 13-
Length of a pea pod
Head is a third of it's body length
Fingerprints are forming
If baby is a boy his testicles have formed and his penis is growing
If baby is a girl then her ovaries are finished growing containing 2 million eggs
Week14-
Size of a lemon
Body and limbs are now growing faster than the head
Arms and legs are moving in a coordinated way
Week 15-
Size of an apple
Using swallowing and sucking abilities
Skeleton is hardening
Legs, although still short are growing -
3rd Month (Week 15 and 16)
Week 15 cont-
Eyes are now sensitive to light
Hearing abilities are developing
Week 16-
Size of an avocado
Baby more than doubles it's weight causing the placenta to grow too
Baby's neck muscles and back bone are getting stronger
Circulatory system is fully developed and working -
4th Month (Weeks 17 and 18)
Week 17-
Size of a turnip
Unique fingerprints finished forming
Hearing is improving
Myelin is slowly wrapping around the spinal cord to help speed up messages sent to and from the brain
Head and body are proportional
Bones harden
Week 18-
Size of a bell pepper
Ears are in final position
Eyebrows appear
Might be able to tell sex of the baby
If baby is a girl her vagina, uterus, and Fallopian tubes are formed
If baby is a boy his penis and testicles are defined -
5th Month (Weeks 21and 22)
Week 21-
Length of a carrot
Skin is transparent and slowly turning pink
The placenta will dwarf as the baby grows but it will continue growing as it gives nutrients
Week 22-
Size of spaghetti squash
Eyes have formed but the irises do not have any pigment
Baby continues to swallow amniotic fluid which is good practice for the digestive system
Meconium accumulates in her bowel. -
5th Month (Weeks 22-24)
Week 22-
If you're having girl mammary glands, responsible for making breastmilk develop
If you’re having a boy his testes into his scrotum
Week 23-
Weighs as much as a large mango
Becoming more sensitive to sound
Bone marrow is making blood cells
Week 24-
Length of an ear of corn
Sleeping and waking patterns are more defined
Brain is growing rapidly
Facial muscles are getting a work out from expressions
Lung are developed enough that if born early there is a chance of survival -
6th Month (Week 26-28)
Week 26 cont-
If you're having a boy testicles are continuing their journey from the pelvis towards the scrotum
Baby's taste buds are now fully developed
Nostrils are beginning to open
Mouth and lips are becoming more sensitive
Week 27-
Same as a head of cauliflower
Opens eyes for first time
Baby experiences Rapid Eye Movement (REM) sleep
Week 28-
Weighs same as an aubergine
Hiccuping is common to feel you baby do in the womb -
6th Month (Week 29)
Week 29-
Size of a butternut squash
Brain gaining more folds making it more complex
Brain growth requires more than half the energy used by your baby Baby's brain will have created billions of neurons.
Bones continue to harden -
7 Months (Week 31-33)
Week 31
Kicks and bumps will feel different
Week 32
As long as a kale leaf
Babies born at this time have a good chance of surviving
Fingernails and toenails are fully developed
Baby might even scratch his or herself if he or she gets an itch
Week 33
Size of a pineapple
Brain and nervous system are full development
Baby's skin is still continuing to smooth out and become less wrinkly
The white fat below baby's skin causes his or hers skin to be less red
Baby's skull is soft for the birth canal -
8 Months (Week 38)
Week 38
As long as a leek
Baby will start grasping things with his or her hands -
9 Months (Weeks 39-40)
Week 39
Baby might be arriving soon
Size of a mini-watermelon
Once baby is born the doctor or midwife will check his or hers length, weight and head circumference
Baby's organs are developed.
Baby's skin is becoming thicker and paler
Baby's lungs are working sufficiently
Baby may cry or splutter to clear his airways.
Week 40
Weighs the same as a small pumpkin
Bab's hair may continue to get thick and nails may grow more too -
6th Month (Weeks 25-26)
Week 25-
Size of a swede
Becomes more chubby
Skin becomes smooth
Senses become more sophisticated
Baby's eyes have rods and cones allowing him to see light
Reflexes develop
Week 26-
Weighs as much as a red cabbage
Body is supported by the spin which is getting stronger
Response to sound is more consistent
Lungs continue to develop, blood vessels grow as well as alevoli -
7th Month (Weeks 30-31)
Week 30
Size of a cabbage
Growth in length will slow down but baby will continue to gain weight until born
Baby will respond to light by turning his or her head when a flashlight is place at the bump
Eyesight is still developing
Amniotic fluid surrounding the baby is increasing
Week 31
Size of a coconut
Starting to look more like a newborn
Wrinkled skin becomes more smooth
As baby grows room in the womb becomes limited this is where baby will assume the classic fetal position -
8 Months (Weeks 34-35)
Week 34
Size of a cantaloupe
If born at 34 it is very unlikely health problems will occur
Baby is filling out; the layers of fat help regulate body temperature
Baby still needs you to help him or her to not get too cold or hot
Baby can recognize your voice, baby also might be able to recognize songs
The parts of baby's ears that sends messages are becoming more mature
Week 35
Size of a honeydew
You can tell how baby is moving by watching your bump
Some movements may feel uncomfortable. -
8 Months (Weeks 36-37)
Week 36
Similar in length to romaine lettuce
Baby is full-term meaning he or she could come any day
baby continues to shed what's left of her downy lanugo hair and vernix caseosa
Your midwife or doctor will check to see if baby is in the cephalic position
Baby might shift down
Week 37
Similar in length to swiss chard
Baby is working his facial muscles
Baby's toenails might be at the ends of his or her toes
Baby's digestive system is still developing
Baby's movement pattern will still be regular
