Prenatal Development

18 terms by eam722

Create a new folder

Advertisement Upgrade to remove ads

what are the 4 periods of gestation?

germinal/zygote
embryonic
fetal
birth

what develops in the ectoderm?

brain and spinal cord (CNS)

what develops in the mesoderm?

muscles, skeletal system, circulatory system

what develops in the endoderm?

digestive system, lungs, and urinary tract

how long is the embryo in the embryonic period?

one inch

what happens in the germinal period?

fertilized egg travels to uterus
blastocyst implants on wall
placenta begins to form

what happens in the fetal period?

external genitalia begins to form
stimulation of sound and light
begins to feel pain

what is the age of viability?

22-26 weeks

what percent of time is the fetus usually awake?

11-16% of the time

at the end of the fetal period, how long is the fetus and how much will it weight approximately?

18-20 inches long and 6.5-7.5 lbs.

how much does the mother have to be dilated and effaced for expulsion?

10cm dilated and 100% effaced

how many weeks is full term?

40 weeks

what is the final step of birth?

placental birth

what are the two main influences on development during gestation?

genetics and environment

what are the environmental factors that influence gestation?

teratogens
fetal stimulation
mother's behavior
mother's demographics

what are teratogens?

disease or drugs that influence development

what are three demographics of the mother that influence gestation?

age
race
SES

what are influences on development at birth?

medicinal interventions
delivery date
birth weight
childbirth approach

Please allow access to your computer’s microphone to use Voice Recording.

Having trouble? Click here for help.

We can’t access your microphone!

Click the icon above to update your browser permissions above and try again

Example:

Reload the page to try again!

Reload

Press Cmd-0 to reset your zoom

Press Ctrl-0 to reset your zoom

It looks like your browser might be zoomed in or out. Your browser needs to be zoomed to a normal size to record audio.

Please upgrade Flash or install Chrome
to use Voice Recording.

For more help, see our troubleshooting page.

Your microphone is muted

For help fixing this issue, see this FAQ.

Star this term

You can study starred terms together

NEW! Voice Recording

Create Set