1.2 - fetal development

last known menstrual period

what does LNMP mean

10; 9.5

a lunar calendar equates to _____ months

a calendar equates to _________months

• time of fertilization

• from last known menstrual period (LNMP)

what are the 2 different forms of time doctors use to estimate date for delivery

0-2 week

what’s the time period of the germinal period

3-8 weeks

what’s the time period of the embryonic period

3-6 months

7-9 months

what’s the time period of the early and later fetal period

• germinal period

• embryonic period

• fetal period

list the 3 trimesters in order

germinal (1)

which trimester is where rapid cell division occurs

critical period

__________ is a specific time during development when a particular event has its greatest consequences

critical

sensitive or critical period:

begins and ends abruptly

sensitive

sensitive or critical period:

begins and ends gradually

folic acid

the ___________ vitamin is crucial in the first 2 weeks of pregnancy because it helps prevent severe neural tube defects

8-9

day ________ after conception is where the egg is implanted on the uterus

28 days

what day does the tube fusion occur

• endoderm

• mesoderm

• ectoderm

what are the 3 layers of tissues that devlop during the embryonic period

second (embryonic)

which trimester is where the primitive streak, neural plate, and tube fusion occur

get a snack

26 (fetal period)

if a baby is born at less than ______ weeks there are increased risk of neurodevelopmental disability

36 weeks or under, 37+ is consdiered normal

at what week is a baby considered premature meaning PT needs to work with them

5

at week ________ from conception the heart beat develops

heart

what is the first functioning organ in tubular form

• 21

• 26-29

• 32

lung development:

• week _______ surfactant begins

• week _______ lunges developed enough to breathe

• week _______ alveoli developed for better gas exchange

3

the primitive streak starts at week _________

28

the gyri continues to form through week _______

• 28-30

• 54-55 (week 9-12)

• week 13-16

bone development:

• day _________ limb bud appearing

• day _________ fingers and toes

• week ________ ossification begins

• touch

• vestibular

• smell

• taste

• hearing

• sight

what is the order of the development of senses

16-18 weeks

at what point during the baby development does the mom start to feel the baby

2nd

which trimester does the baby start to hiccup and can be startled

26-28 (this is why premature babies have trouble with nap time and sleep regulation)

at week ___________ the babies sleep cycle starts

utero

most primitive reflexes begin in ___________

• absent (peripheral injury)

• too weak

• asymmetrical

• too strong or persistent (CNS problem)

4 clinical findings that would warrant further investigation when evaluating the neural system

flexion (extension could indicate a motor development issue)

once the baby is born, you would expect them to be in (flexion or extension)

low birth weight

what does LBW mean?

very low birth weight

what does VLBW mean?

extremely low birth weight

what does ELBW mean?

small for gestational age

what does SGA mean?

large for gestational age

what does LGA mean?

intra-uterin growth restriction or retardation

what does IUGR mean?

• < 5

• < 3.3

• < 2.2

what are the values…

• low birth weight =

• very low birth weight =

• extremely low birth weight =