Fetal Development Flashcards
Organogenesis
Wk 8
Double chamber hearts visible
Wk 5
Heart begins to beat
Wk 2/ wk 3
Gender recognizable
Wk 12
Heart beating
Wk 5
Brain and spinal cord
Wk 2/ wk 3
Limb buds form
Wk 5
Eyelids begins to fuse
Wk 8
Face is well formed
Wk 12
Circulatory system through umbilical cord well established
Wk 8
Kidneys begin to form urine
Wk 12
Labia majora well developed
Wk 40
Blood circulation begins
Wk 2/ wk 3
Lung buds appear
Wk 2/ wk 3
Spontaneous movements occur
Wk 12
Lungs developed sufficiently to provide gas exchange
Wk 28
L/S ratio greater than 2:1
Wk 36
Limbs strong and slender
Wk 12
Testes in the scrotum
Wk 40
Lanugo hair begins to dvelop
Wk 16
Nails present
Wk 20
Fingernails extend beyond fingertips
Wk 40
Enamel and denting depositioning
Wk 20
Muscles dvelop
Wk 20
Skeletal ossification
Wk 16
Vernix caseosa decreases
Wk 40
Heartbeat by doppler
Wk 12
10 to 12
Skin reddish and wrinkled
Wk 24
Reflex hand grasp
Wk 24
Fetal skin transparent
Wk 16
Heartbeat by fetoscope
Wk 20
Fetus has ability to hear
Wk 24
Lecithin formation
Wk 28
Limbs well flexed
Wk 28
If born baby can breathe
Wk 28
Hair on head well formed
Wk 24
Bones fully developed
Wk 32
Skin is pink and body rounded
Wk 36
Lanugo covers entire body
Wk 20
L/S ratio 1.2/1
Wk 32
Skin less wrinkled
Wk 36
Lanugo in upper arms and shoulders
Wk 40
Active movements present
Wk 16
Eyelids open and close
Wk 28
Subcutaneous fat present
Wk 32
Lanugo disappearing
Wk 36
Brain developing rapidly
Wk 28
Sole (plantar) creases run down to the heel
Wk 40
Blastocyst free floating
Wk 1