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Welcome to my Baby’s

Timeline of Foetal Development

1st Trimester Baby Development

Week 6

Week 6 2 d scan

Foetal Facts

  •  6 Week – 4D Scan
  • beginning formation of skeleton
  • earliest point to detect multiple pregnancy
  • neural tube closes, forming beginnings ofbrain and spinal cord
  • limb buds that later from arms and legs appear
  • distinct heart forming into chambers
  • heartbeat around 100-115 beats per minute(bpm)

Baby Biometrics

  • Size: Embryo 4-8 mm

Week 7

Foetal Factsweek 7 pregnancy scan

  • 7 Week – 3D Baby Scan
  • ultrasound can identify evidence of ectopic or molar pregnancies
  • can begin to see development of umbilical cord
  • fast development of the hindbrain takes place
  • heart rate increases from 130 to 160 bpm

Baby Biometrics

  • Size: 9-14 mm Crown to Rump Length (CRL) measurement of head to bottom of rump

Week 8

Foetal Factsweek 8 3d scan

  • 8 Week – 4D Pregnancy Scan
  • expansion of the ventricular system of the brain
  • vertebrae and ribs start to grow
  • eyelids, tip of nose, upper lip visible, and ears develop
  • aortic and pulmonary valves present in heart , separate left and right chambers
  • slightly webbed fingers and toes begin to develop
  • heartbeat around 144-159 bpm

Baby Biometric

  • Size: 15-22 mm CRL

Week 9

Foetal Facts Week 9 4D Scan

  • 9 Week – 3D Foetal Ultrasound Scan
  • embryo officially becomes a foetus
  • hands that flex at the wrist
  • elbows form
  • eyelids cover eyes
  • ears start to take definite shape
  • visible fingers and toes
  • stomach visible

Baby Biometric

  • Size: 24-31 mm CRL, weight 1.5 oz

Week 10

Foetal FactsWeek 10 Ultrasound scan

  • 10 Week – 4D Pregnancy Scan
  • head is clearly divided from the body by neck
  • genitals beginning to form, but still too early to determine gender
  • most of joints developed, arms bend at elbow
  • eyelids fuse shut to keep out amniotic fluid , and upper lip forms
  • intestines begin to move to abdominal cavity
  • some abdominal wall defects detectable through ultrasound
  • placenta visible on ultrasound

Baby Biometric

  • Size: 33-41 mm CRL, weight 1.6 oz

Week 11

Foetal Facts week 11 2d Scan

  • 11 Week –  3D Baby Scan
  • clear outline of spine visible
  • ears in place
  • movement of body and arms and legs seen on ultrasound
  • many major central nervous system defects can be identified through ultrasound
  • heartbeat around 137-144 bpm

Baby Biometric

  • Size: 43-53 mm CRL, weight 1.9 oz

Week 12

Foetal FactsWeek 12 4D Baby Scan

  • 12 Week – 4D Scan
  • circulatory and digestive systems, pancreas, and liver begin early functions
  • can open mouth
  • starts to wiggle fingers
  • corpus callosum , the section of the brain connecting the left and right hemispheres develops
  • possible diagnosis of abdominal wall defects such as gastroschisis and Exomphalos

Baby Biometric

BPD 2.0 cm AC 5.3cm
OFD Femur
HC CRL 4.7 cm
TTD 1.7cm Weight
2nd Trimester Baby Development

Week 13

Foetal Factsweek 13 2d baby scan

  • 13 Week – 3D Foetal Scan
  • head is approximately 1/2 size of body (will be 1/4 by birth)
  • Ultrasound can be used to measure nuchal translucency (thickened section of skin on the back of the neck), evaluate nasal bone, and aid in diagnosis of chromosomal abnormalities
  • earliest diagnosis of limb deformities such as club foot
  • foetal organs such as gallbladder and urinary bladder images and first foetal urine produced

Baby Biometric

BPD 2.4 cm AC 6.3 cm
OFD Femur 1.0 cm
HC CRL 6.0 cm
TTD 2.0 cm Weight 14 grams

Week 14

Foetal Factsweek 14 pregnancy scan

  • 14 Week – 4D Pregnancy Ultrasound Scan
  • foetus has tiny, functional hands and can make a fist
  • neck grows longer, and foetus no longer has to rest chin on chest
  • diagnosis of central nervous system anomalies with vaginal or abdominal scan
  • nuchal translucencies can be measures from 11-14 weeks, and any abnormality in size will lead to further testing

Baby Biometric

BPD 2.8 cm AC 7.5 cm
OFD 3.1 cm Femur 1.2 cm
HC 10.6 cm CRL 7.3 cm
TTD  2.4 cm Weight 25 grams

Week 15

Foetal FactsWeek 15 3d ultrasound scan

  • 15 Week – 3D Pregnancy Scan
  • intestinal tract continues development
  • ability to suck helps develop cheek and jaw
  • evaluation of upper lip and anterior palate for possible Cleft

Baby Biometric

BPD 3.2 cm AC 8.5 cm
OFD 3.8 cm Femur 16 cm
HC 11.5 cm CRL 8.6 cm
TTD 2.7 cm Eight 50 Grams

Week 16

Foetal Factsweek 16 4d scan

  • 16 week – 4D Baby Scan
  • foetal spine visible ultrasound able to detect neural tube defects
  • facial expressions like smiles visible
  • foetus urinates in amniotic fluid, then starts swallowing amniotic fluid, which demonstrates kidney function
  • motions like kicking increases

Baby Biometric

BPD 3.5 cm AC 9.7 cm
OFD 4.1 cm Femur 1.8 cm
HC 12.7 cm CRL 9.7 cm
TTD 3.1cm Weight 80 grams

Week 17

  • Foetal Facts week 17 ultrasound scan

  • 17 Week – 3D Scan
  • layers of fat start filling out the body
  • eyes more forward on face than previous weeks
  • ears start to protrude from head
  • gender determination usually accurate
  • distal spine ossifies; neural tube defects in distal spine diagnosable

Baby Biometric

BPD 3.8 cm AC 10.7 cm
OFD 4.6 cm Femur 2.2 cm
HC 14 cm CRL 11 cm
TTD 3.4 cm Weight 100 grams

Week 18

Foetal FactsWeek 18 4d scan

  • 18 Week – 4D Foetal Ultrasound
  • bones begin to harden from cartilage
  • yawning, sucking, hiccupping and making faces all start
  • ears in final position
  • routine ultrasound scan at 18-20 weeks to diagnose congenital malformations, exclude multiple pregnancies, verify birth dates and growth, confirm sex of the foetus, anatomical survey and analyse maternal well-being.

Baby Biometric

BPD 4.2 cm AC 11.6 cm
OFD 5.0 cm Femur 2.5 cm
HC 15.2 cm CRL 12.0 cm
TTD 3.7 cm Weight 150 grams

Week 19

Foetal Facts week 19 3d scan

  • 19 Week – 3D Pregnancy Scan
  • arms and legs in proportion
  • diagnosis of cervical incompetence by ultrasound
  • craniocervical junction seen (at base of skull)

Baby Biometric

BPD 4.6 cm AC 12.6 cm
OFD 5.4 cm Femur 25 cm
HC 16.4 cm CRL 13.0 cm
TTD 4.0 cm Weight 200 grams

Week 20

Foetal Facts week 20 pregnancy ultrasound scan

  • 20 Week – 4D Baby Scan
  • genitals fully formed
  • strong rapid heartbeat
  • practises breathing by moving chest up and down intermittently
  • tooth buds noted
  • many malformations in brain can be diagnosed accurately by this time
  • diagnosis of lung masses

Baby Biometric

BPD 4.9 cm AC 13.5 cm
OFD 5.8 cm Femur 3.1 cm
HC 17.6 cm CRL 14.0 cm
TTD 4.4 cm Weight 250 grams

Week 21

Foetal Facts week 21 3d baby scan

  • 21 Week – 3D Pregnancy Scan
  • continued and rapid development of the brain
  • hiccups start (jerky motions of lungs practising breathing)
  • partial ossifiaction of the laminae in the thoracic vertebrae seen
  • many skeletal Dysplasias can be visualised if present

Baby Biometric

BPD 5.2 cm AC 14.5 cm
OFD 6.3 cm Femur 3.4 cm
HC 19.0 cm CHL 26.7 cm
TTD 4.7 cm Weight 300 grams

Week 22

Foetal Factsweek 22 4d ultrasound scan

  • 22 Week – 4D Scan
  • distinct lips form
  • pancreas develops
  • salivary glands formed
  • gastric outlet obstruction (associated with enlarged stomach and polyhydramnios) found sonographically

Baby Biometric

BPD 5.6 cm AC 15.5 cm
OFD 6.7 cm Femur 3.6 cm
HC 20.3 cm CHL 27.8 cm
TTD 5.0 cm Weight 350 grams

Week 23

Foetal Factsweek 23 baby scan

  • 23 Week – 3D Scan
  • foetus starts actively moving and flexing newly developed muscular system
  • kicking and rolling increases
  • foetus can hear and is especially sensitive to loud noises
  • lumbar region and ossification

Baby Biometric

BPD 5.9 cm AC 16.5 cm
OFD 7.2 cm Femur 3.9 cm
HC 21.5 cm CHL 28 cm
TTD 5.3 cm Weight 450 grams

Week 24

Foetal Facts Week 24 4d baby scan

  • 24 week – 4D Foetal Scan
  • foetus starts to run out of room to roll, starts kicking more
  • intrauterine growth restriction {IUGR} foetus can be evaluated for suspected growth restrictions by comparing current and previous measurements
  • foetus can be evaluated for macrosomia, growth beyond a specific weight (usually 4000-4500 grams)

Baby Biometric

BPD 6.2 cm AC 17.3 cm
OFD 7.6 cm Femur 41 cm
HC 22.6 cm CHL 30 cm
TTD 5.6 cm Weight 530 grams
3rd Trimester Baby Development

Week 25

Foetal Facts week 25 4d pregnancy scan

  • 25 Week – 3D Baby Scan
  • large amount of lung development
  • nostrils begin to open
  • can curl fingers in to a fist and touch its toes

Baby Biometric

BPD 6.5 cm AC 18.3 cm
OFD 8.0 cm Femur 4.4 cm
HC 24.0 cm CHL 31 cm
TTD 5.9 cm Weight 700 grams

Week 26

Foetal Factsweek 26 3d baby scan

  • 26 week – 4D Pregnancy Scan
  • open and close eyes
  • stronger, more supple spine
  • eyes fully developed, can blink

Baby Biometric

 

BPD 6.8 CM AC 18.1 cm
OFD 8.4 CM Femur 4.7 cm
HC 25.1 CM CHL 32.5 cm
TTD 6.5 CM Weight 850 grams

Week 27

Foetal Facts week 27 3d scan

  • 27 Week – 3D Pregnancy Ultrasound
  • rapid brain development
  • fat stores continue to develop to keep baby warm once its born
  • lungs continue development

Baby Biometric

BPD 7.1 cm AC 20.2 cm
OFD 8.8 cm Femur 4.9 cm
HC 26.3 cm CHL 34.0 cm
TTD 6.2 cm Weight 1000 grams

Week 28

Foetal Factsweek 28 4d scan

  • 28 week – 4D Baby Scans
  • brain takes on folds to look more like an adult brain because of rapid growth
  • eyes open when awake and close when asleep
  • possibly visible hair on head
  • rate of growth for twins slower than rate of growth for singletons after this time

Baby Biometric

BPD 7.4 cm AC 21.1 cm
OFD 9.1 cm Femur 5.1 cm
HC 27.4 cm CHL 35.5 cm
TTD 6.9 cm Weight 1100 grams

Week 29

Foetal Facts week 29 4d scan images

  • 29 Week – 3D Foetal Ultrasound
  • organ and nerve development nearly complete
  • kicks and jabs became more vigorous
  • eyes sensitive to light, sometimes can sense difference between day and night

Baby Biometric

 

BPD 7.7 cm AC 22.2 cm
OFD 9.5 cm Femur 5.4 cm
HC 28.4 cm CHL 37 cm
TTD 7.2 cm Weight 1250 grams

Week 30

Foetal Factsweek 30 3d scan images

  • 30 Week – 4D Pregnancy Baby Scan
  • close to having a fully functional nervous system that regulates body
  • tiny internal hiccups, foetus swallowing amniotic fluid and practising breathing
  • may develop sleeping patterns
  • foetal adrenal gland visible

Baby Biometric

BPD 8.0 cm AC 23.0 cm
OFD 9.8 cm Femur 5.6 cm
HC 29.3 cm CHL 38.5 cm
TTD 7.4 cm Weight 1400 grams

Week 31

Foetal Facts week 31 pregnancy scan

  • 31 Week – 3D Baby Scan
  • developing digestive system
  • if a male, testes start to descend from body cavity to scrotum

Baby Biometric

BPD 8.2 cm AC 24.0 cm
OFD 10.0 cm Femur 5.9 cm
HC 30.3 cm CHL 40 cm
TTD 7.8 cm Weight 1600 grams

Week 32

Foetal Facts week 32 4d pregnancy scan

  • 32 Week – 4D Pregnancy Scan
  • growth of neck allows foetus to turn head from side to side
  • wrinkles start to disappear
  • thick layer of fat
  • still relies on umbilical cord for nourishment
  • more rolling because no room
  • foetal bladder volume 10 mL, at 40 weeks, it will quadruple

Baby Biometric 

BPD 8.5 cm AC 24.9 cm
OFD 10.3 cm Femur 6.1 cm
HC 31.1 cm CHL 41.5 cm
TTD 8.1 cm Weight 1800 grams

Week 33

Foetal Factsweek 33 3d scan

  • 33 week – 3D Foetal Scan
  • increase in head size of about 3/8 inch circumference due to massive brain growth this week
  • lungs continue to mature
  • long bones still completing change from cartilage to bone at the joints
  • touch and sight more defined

Baby Biometric

BPD 8.7 cm AC 25.8 cm
OFD 10.5 cm Femur 6.3 cm
HC 31.8 cm CHL 43 cm
TTD 8.3 cm Weight 2000 grams

Week 34

Foetal Facts week 34 baby scan

  • 34 Week – 4D Ultrasound Pregnancy Scan
  • foetus starts to look more like a human
  • more light reaches womb, foetus opens and closes eyes in response
  • mother possibly has 3rd trimester ultrasound to evaluate foetal size and growth

Baby Biometric

BPD 8.9 cm AC 26.8 cm
OFD 10.7 cm Femur 6.5 cm
HC 32.5 cm CHL 44.5 cm
TTD 8.6 cm Weight 2250 grams

Week 35

Foetal Factsweek 35 3d scan

  • 35 Week – 4D Pregnancy scan
  • lungs fully developed
  • developing daily activity cycles
  • physical developments slow as foetus puts on weight
  • in males, testes complete descent

Baby Biometric

BPD 9.1 cm AC 27.7 cm
OFD 10.9cm Femur 6.7 cm
HC 33.2 cm CHL 45 cm
TTD 8.9 cm Weight 2550 grams

Week 36

Foetal Facts week 36 4d scan

  • 36 weeks – 4D Baby Scan
  • foetus puts on more weight and fat before birth
  • continues to move, rolling and kicking
  • head moves down getting ready for birth
  • bones in the head pliable for pending trip through the birth canal

Baby Biometric

BPD 9.3 cm AC 28.7 cm
OFD 11.1 cm Femur 6.9 cm
HC 33.7 cm CHL 46 cm
TTD 9.2 cm Weight 2750 grams

Week 37

Foetal Facts37 week pregnancy scan

  • 37 Weeks – 3D pregnancy scan
  • practises breathing by inhaling and exhaling amniotic fluid
  • continues to move, practising motions like grasping hands, sucking thumb, turning head and swallowing
  • responds and turns towards light

Baby Biometric

BPD AC
OFD Femur
HC CHL
TTD Weight

Week 38

Foetal Facts week 38 private scan

  • 38 Week – 4D foetal ultrasound
  • officially full term
  • circumference of head and abdomen approximately same size
  • presence of free floating particles of vernix (the waxy coating around the foetus) on real time ultrasonography may confirm foetal maturity

Baby Biometric

BPD 9.6 cm AC 30.6 cm
OFD 11.3 cm Femur 7.3 cm
HC 34.4 cm CHL 48.5 cm
TTD 9.7 cm Weight 3100 grams

Week 39

Foetal Facts week 39 pregnancy scan

  • 39 Week – 3D Ultrasound
  • should be in position and ready for birth
  • 300 bones in body (some of which will fuse together after birth), although skull bone still not fully formed
  • brain is the last organ to fully develop

Baby Biometric

BPD 9.8 cm AC 31.5 cm
OFD 11.4 cm Femur 7.4 cm
HC 34.7 cm CHL 50 cm
TTD 9.9 cm Weight 3250 grams

Week 40

Foetal Facts 40 week scan

  • 40 Week – 4D Baby Scan
  • BIRTH
  • baby not officially considered “overdue” until after 42 weeks
  • if delivered vaginally, baby’s head will appear cone shaped for a day or two because of travel through the birth canal
  • eyes puffy. vision blurred, can only focus 1 inch away
  • small breast buds; chest sticks out

Baby Biometric

 

BPD 9.9 cm AV 32.0 cm
OFD 11.5 cm Femur 7.5 cm
HC 34.9 cm CHL 52 cm
TTD 10.1 cm Weight 3400 grams
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Baby’s Timeline of Foetal Development

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1st Trimester Baby Development

Week 6

Foetal Facts

  •  6 Week – 4D Scan
  • beginning formation of skeleton
  • earliest point to detect multiple pregnancy
  • neural tube closes, forming beginnings ofbrain and spinal cord
  • limb buds that later from arms and legs appear
  • distinct heart forming into chambers
  • heartbeat around 100-115 beats per minute(bpm)

Week 6 2 d scan

 

 

 

 

 

Baby Biometrics

  • Size: Embryo 4-8 mm

Week 7

Foetal Facts

  • 7 Week – 3D Baby Scan
  • ultrasound can identify evidence of ectopic or molar pregnancies
  • can begin to see development of umbilical cord
  • fast development of the hindbrain takes place
  • heart rate increases from 130 to 160 bpm

Week 7 2d scan

Baby Biometrics

  • Size: 9-14 mm Crown to Rump Length (CRL) measurement of head to bottom of rump

Week 8

Foetal Facts

  • 8 Week – 4D Pregnancy Scan
  • expansion of the ventricular system of the brain
  • vertebrae and ribs start to grow
  • eyelids, tip of nose, upper lip visible, and ears develop
  • aortic and pulmonary valves present in heart , separate left and right chambers
  • slightly webbed fingers and toes begin to develop
  • heartbeat around 144-159 bpm

Week 8 3d baby scan

Baby Biometric

  • Size: 15-22 mm CRL

Week 9

Foetal Facts 

  • 9 Week – 3D Foetal Ultrasound Scan
  • embryo officially becomes a foetus
  • hands that flex at the wrist
  • elbows form
  • eyelids cover eyes
  • ears start to take definite shape
  • visible fingers and toes
  • stomach visible

Week 9 4d baby scan

Baby Biometric

  • Size: 24-31 mm CRL, weight 1.5 oz

Week 10

Foetal Facts

  • 10 Week -4D Pregnancy Scan
  • head is clearly divided from the body by neck
  • genitals beginning to form, but still too early to determine gender
  • most of joints developed, arms bend at elbow
  • eyelids fuse shut to keep out amniotic fluid , and upper lip forms
  • intestines begin to move to abdominal cavity
  • some abdominal wall defects detectable through ultrasound
  • placenta visible on ultrasound

Week 10 Ultrasound scan

Baby Biometric

  • Size: 33-41 mm CRL, weight 1.6 oz

Week 11

Foetal Facts 

  • 11 Week – 3D Baby Scan
  • clear outline of spine visible
  • ears in place
  • movement of body and arms and legs seen on ultrasound
  • many major central nervous system defects can be identified through ultrasound
  • heartbeat around 137-144 bpm

week 11 2d Scan

Baby Biometric

  • Size: 43-53 mm CRL, weight 1.9 oz

Week 12

Foetal Facts

  • 12 Week – 4D Scan
  • circulatory and digestive systems, pancreas, and liver begin early functions
  • can open mouth
  • starts to wiggle fingers
  • corpus callosum , the section of the brain connecting the left and right hemispheres develops
  • possible diagnosis of abdominal wall defects such as gastroschisis and Exomphalos

Week 12 4D Baby Scan

Baby Biometric

BPD 2.0 cm AC 5.3cm
OFD Femur
HC CRL 4.7 cm
TTD 1.7cm Weight
2nd Trimester Baby Development

Week 13

Foetal Facts

  • 13 Week – 3D Foetal Scan
  • head is approximately 1/2 size of body (will be 1/4 by birth)
  • Ultrasound can be used to measure nuchal translucency (thickened section of skin on the back of the neck), evaluate nasal bone, and aid in diagnosis of chromosomal abnormalities
  • earliest diagnosis of limb deformities such as club foot
  • foetal organs such as gallbladder and urinary bladder images and first foetal urine produced

week 13 2d baby scan

Baby Biometric

BPD 2.4 cm AC 6.3 cm
OFD Femur 1.0 cm
HC CRL 6.0 cm
TTD 2.0 cm Weight 14 grams

Week 14

Foetal Facts

  • 14 Week – 4D Pregnancy Ultrasound Scan
  • foetus has tiny, functional hands and can make a fist
  • neck grows longer, and foetus no longer has to rest chin on chest
  • diagnosis of central nervous system anomalies with vaginal or abdominal scan
  • nuchal translucencies can be measures from 11-14 weeks, and any abnormality in size will lead to further testing

week 14 pregnancy scan

 Baby Biometric

BPD 2.8 cm AC 7.5 cm
OFD 3.1 cm Femur 1.2 cm
HC 10.6 cm CRL 7.3 cm
TTD  2.4 cm Weight 25 grams

Week 15

Foetal Facts

  • 15 Week – 3D Pregnancy Scan
  • intestinal tract continues development
  • ability to suck helps develop cheek and jaw
  • evaluation of upper lip and anterior palate for possible Cleft

Week 15 3d ultrasound scan

 Baby Biometric

BPD 3.2 cm AC 8.5 cm
OFD 3.8 cm Femur 16 cm
HC 11.5 cm CRL 8.6 cm
TTD 2.7 cm Eight 50 Grams

Week 16

Foetal Facts

  • 16 week – 4D Baby Scan
  • foetal spine visible ultrasound able to detect neural tube defects
  • facial expressions like smiles visible
  • foetus urinates in amniotic fluid, then starts swallowing amniotic fluid, which demonstrates kidney function
  • motions like kicking increases

week 16 4d scan

 Baby Biometric

BPD 3.5 cm AC 9.7 cm
OFD 4.1 cm Femur 1.8 cm
HC 12.7 cm CRL 9.7 cm
TTD 3.1cm Weight 80 grams

Week 17

  • Foetal Facts 

  • 17 Week – 3D Scan
  • layers of fat start filling out the body
  • eyes more forward on face than previous weeks
  • ears start to protrude from head
  • gender determination usually accurate
  • distal spine ossifies; neural tube defects in distal spine diagnosable

week 17 ultrasound scan

 Baby Biometric

BPD 3.8 cm AC 10.7 cm
OFD 4.6 cm Femur 2.2 cm
HC 14 cm CRL 11 cm
TTD 3.4 cm Weight 100 grams

Week 18

Foetal Facts

  • 18 Week – 4D Foetal Ultrasound
  • bones begin to harden from cartilage
  • yawning, sucking, hiccupping and making faces all start
  • ears in final position
  • routine ultrasound scan at 18-20 weeks to diagnose congenital malformations, exclude multiple pregnancies, verify birth dates and growth, confirm sex of the foetus, anatomical survey and analyse maternal well-being.

Week 18 4d scan

Baby Biometric

BPD 4.2 cm AC 11.6 cm
OFD 5.0 cm Femur 2.5 cm
HC 15.2 cm CRL 12.0 cm
TTD 3.7 cm Weight 150 grams

Week 19

Foetal Facts 

  • 19 Week – 3D Pregnancy Scan
  • arms and legs in proportion
  • diagnosis of cervical incompetence by ultrasound
  • craniocervical junction seen (at base of skull)

week 19 3d scan

 Baby Biometric

BPD 4.6 cm AC 12.6 cm
OFD 5.4 cm Femur 25 cm
HC 16.4 cm CRL 13.0 cm
TTD 4.0 cm Weight 200 grams

Week 20

Foetal Facts 

  • 20 Week – 4D Baby Scan
  • genitals fully formed
  • strong rapid heartbeat
  • practises breathing by moving chest up and down intermittently
  • tooth buds noted
  • many malformations in brain can be diagnosed accurately by this time
  • diagnosis of lung masses

week 20 pregnancy ultrasound scan

 Baby Biometric

BPD 4.9 cm AC 13.5 cm
OFD 5.8 cm Femur 3.1 cm
HC 17.6 cm CRL 14.0 cm
TTD 4.4 cm Weight 250 grams

Week 21

Foetal Facts 

  • 21 Week – 3D Pregnancy Scan
  • continued and rapid development of the brain
  • hiccups start (jerky motions of lungs practising breathing)
  • partial ossifiaction of the laminae in the thoracic vertebrae seen
  • many skeletal Dysplasias can be visualised if present

week 21 3d baby scan

Baby Biometric

BPD 5.2 cm AC 14.5 cm
OFD 6.3 cm Femur 3.4 cm
HC 19.0 cm CHL 26.7 cm
TTD 4.7 cm Weight 300 grams

Week 22

Foetal Facts

  • 22 Week – 4D Scan
  • distinct lips form
  • pancreas develops
  • salivary glands formed
  • gastric outlet obstruction (associated with enlarged stomach and polyhydramnios) found sonographically

week 22 4d ultrasound scan

 Baby Biometric

BPD 5.6 cm AC 15.5 cm
OFD 6.7 cm Femur 3.6 cm
HC 20.3 cm CHL 27.8 cm
TTD 5.0 cm Weight 350 grams

Week 23

Foetal Facts

  • 23 Week – 3D Scan
  • foetus starts actively moving and flexing newly developed muscular system
  • kicking and rolling increases
  • foetus can hear and is especially sensitive to loud noises
  • lumbar region and ossification

week 23 baby scan

 Baby Biometric

BPD 5.9 cm AC 16.5 cm
OFD 7.2 cm Femur 3.9 cm
HC 21.5 cm CHL 28 cm
TTD 5.3 cm Weight 450 grams

Week 24

Foetal Facts 

  • 24 week – 4D Foetal Scan
  • foetus starts to run out of room to roll, starts kicking more
  • intrauterine growth restriction {IUGR} foetus can be evaluated for suspected growth restrictions by comparing current and previous measurements
  • foetus can be evaluated for macrosomia, growth beyond a specific weight (usually 4000-4500 grams)

Week 24 4d baby scan

 Baby Biometric

BPD 6.2 cm AC 17.3 cm
OFD 7.6 cm Femur 41 cm
HC 22.6 cm CHL 30 cm
TTD 5.6 cm Weight 530 grams
3rd Trimester Baby Development

Week 25

Foetal Facts

  • 25 Week – 3D Baby Scan
  • large amount of lung development
  • nostrils begin to open
  • can curl fingers in to a fist and touch its toes

week 25 4d pregnancy scan

 Baby Biometric

BPD 6.5 cm AC 18.3 cm
OFD 8.0 cm Femur 4.4 cm
HC 24.0 cm CHL 31 cm
TTD 5.9 cm Weight 700 grams

Week 26

Foetal Facts

  • 26 week – 4D Pregnancy Scan
  • open and close eyes
  • stronger, more supple spine
  • eyes fully developed, can blink

week 26 3d baby scan

Baby Biometric

 

BPD 6.8 CM AC 18.1 cm
OFD 8.4 CM Femur 4.7 cm
HC 25.1 CM CHL 32.5 cm
TTD 6.5 CM Weight 850 grams

Week 27

Foetal Facts

  • 27 Week – 3D Pregnancy Ultrasound
  • rapid brain development
  • fat stores continue to develop to keep baby warm once its born
  • lungs continue development

week 27 3d scan

 Baby Biometric

BPD 7.1 cm AC 20.2 cm
OFD 8.8 cm Femur 4.9 cm
HC 26.3 cm CHL 34.0 cm
TTD 6.2 cm Weight 1000 grams

Week 28

Foetal Facts

  • 28 week – 4D Baby Scans
  • brain takes on folds to look more like an adult brain because of rapid growth
  • eyes open when awake and close when asleep
  • possibly visible hair on head
  • rate of growth for twins slower than rate of growth for singletons after this time

week 28 4d scan

 Baby Biometric

BPD 7.4 cm AC 21.1 cm
OFD 9.1 cm Femur 5.1 cm
HC 27.4 cm CHL 35.5 cm
TTD 6.9 cm Weight 1100 grams

Week 29

Foetal Facts

  • 29 Week – 3D Foetal Ultrasound
  • organ and nerve development nearly complete
  • kicks and jabs became more vigorous
  • eyes sensitive to light, sometimes can sense difference between day and night

week 29 4d scan images

Baby Biometric

BPD 7.7 cm AC 22.2 cm
OFD 9.5 cm Femur 5.4 cm
HC 28.4 cm CHL 37 cm
TTD 7.2 cm Weight 1250 grams

Week 30

Foetal Facts

  • 30 Week – 4D Pregnancy Baby Scan
  • close to having a fully functional nervous system that regulates body
  • tiny internal hiccups, foetus swallowing amniotic fluid and practising breathing
  • may develop sleeping patterns
  • foetal adrenal gland visible

week 30 3d scan images

 Baby Biometric

BPD 8.0 cm AC 23.0 cm
OFD 9.8 cm Femur 5.6 cm
HC 29.3 cm CHL 38.5 cm
TTD 7.4 cm Weight 1400 grams

Week 31

Foetal Facts 

  • 31 Week – 3D Baby Scan
  • developing digestive system
  • if a male, testes start to descend from body cavity to scrotum

week 31 pregnancy scan

 Baby Biometric

BPD 8.2 cm AC 24.0 cm
OFD 10.0 cm Femur 5.9 cm
HC 30.3 cm CHL 40 cm
TTD 7.8 cm Weight 1600 grams

Week 32

Foetal Facts 

  • 32 Week – 4D Pregnancy Scan
  • growth of neck allows foetus to turn head from side to side
  • wrinkles start to disappear
  • thick layer of fat
  • still relies on umbilical cord for nourishment
  • more rolling because no room
  • foetal bladder volume 10 mL, at 40 weeks, it will quadruple

week 32 4d pregnancy scan

 Baby Biometric 

BPD 8.5 cm AC 24.9 cm
OFD 10.3 cm Femur 6.1 cm
HC 31.1 cm CHL 41.5 cm
TTD 8.1 cm Weight 1800 grams

Week 33

Foetal Facts

  • 33 week – 3D Foetal Scan
  • increase in head size of about 3/8 inch circumference due to massive brain growth this week
  • lungs continue to mature
  • long bones still completing change from cartilage to bone at the joints
  • touch and sight more defined

week 33 3d scan

 Baby Biometric

BPD 8.7 cm AC 25.8 cm
OFD 10.5 cm Femur 6.3 cm
HC 31.8 cm CHL 43 cm
TTD 8.3 cm Weight 2000 grams

Week 34

Foetal Facts

  • 34 Week – 4D Ultrasound Pregnancy Scan
  • foetus starts to look more like a human
  • more light reaches womb, foetus opens and closes eyes in response
  • mother possibly has 3rd trimester ultrasound to evaluate foetal size and growth

week 34 baby scan

Baby Biometric

BPD 8.9 cm AC 26.8 cm
OFD 10.7 cm Femur 6.5 cm
HC 32.5 cm CHL 44.5 cm
TTD 8.6 cm Weight 2250 grams

Week 35

Foetal Facts

  • 35 Week – 4D Pregnancy scan
  • lungs fully developed
  • developing daily activity cycles
  • physical developments slow as foetus puts on weight
  • in males, testes complete descent

week 35 3d scan

 Baby Biometric

BPD 9.1 cm AC 27.7 cm
OFD 10.9cm Femur 6.7 cm
HC 33.2 cm CHL 45 cm
TTD 8.9 cm Weight 2550 grams

Week 36

Foetal Facts

  • 36 weeks – 4D Baby Scan
  • foetus puts on more weight and fat before birth
  • continues to move, rolling and kicking
  • head moves down getting ready for birth
  • bones in the head pliable for pending trip through the birth canal

week 36 4d scan

Baby Biometric

BPD 9.3 cm AC 28.7 cm
OFD 11.1 cm Femur 6.9 cm
HC 33.7 cm CHL 46 cm
TTD 9.2 cm Weight 2750 grams

Week 37

Foetal Facts

  • 37 Weeks – 3D pregnancy scan
  • practises breathing by inhaling and exhaling amniotic fluid
  • continues to move, practising motions like grasping hands, sucking thumb, turning head and swallowing
  • responds and turns towards light

37 week pregnancy scan

 Baby Biometric

BPD AC
OFD Femur
HC CHL
TTD Weight

Week 38

Foetal Facts

  • 38 Week – 4D foetal ultrasound
  • officially full term
  • circumference of head and abdomen approximately same size
  • presence of free floating particles of vernix (the waxy coating around the foetus) on real time ultrasonography may confirm foetal maturity

week 38 private scan

 Baby Biometric

BPD 9.6 cm AC 30.6 cm
OFD 11.3 cm Femur 7.3 cm
HC 34.4 cm CHL 48.5 cm
TTD 9.7 cm Weight 3100 grams

Week 39

Foetal Facts

  • 39 Week – 3D Ultrasound
  • should be in position and ready for birth
  • 300 bones in body (some of which will fuse together after birth), although skull bone still not fully formed
  • brain is the last organ to fully develop

week 39 pregnancy scan

Baby Biometric

BPD 9.8 cm AC 31.5 cm
OFD 11.4 cm Femur 7.4 cm
HC 34.7 cm CHL 50 cm
TTD 9.9 cm Weight 3250 grams

Week 40

Foetal Facts

  • 40 Week – 4D Baby Scan
  • BIRTH
  • baby not officially considered “overdue” until after 42 weeks
  • if delivered vaginally, baby’s head will appear cone shaped for a day or two because of travel through the birth canal
  • eyes puffy. vision blurred, can only focus 1 inch away
  • small breast buds; chest sticks out

40 week scan

 Baby Biometric 

BPD 9.9 cm AV 32.0 cm
OFD 11.5 cm Femur 7.5 cm
HC 34.9 cm CHL 52 cm
TTD 10.1 cm Weight 3400 grams