Card Set Information
Germinal Phase lasts how long?
First 14 days (before missed period)
What is something important that happens during the Germinal Phase?
zygote travels down Fallopian tube, cell division
: implantation, blastocyst
What percentage of natural conceptions fail to implant? Compared to vitro procedure implants?
60% for natural
70% for implant procedures
How long does the Embryo phase last?
3-8 weeks (up to 2 months)
What are some key things that develop during the Embryonic stage?
22 days thin line becomes neural tube
4th week- head takes shape, heart begins with a minuscule blood vessel that begins to pulsate
5th week- arms and legs buds appear, tail from spine
8th week- head more rounded; face formed and all basic organs and body parts (but sex) is present
How long is the Fetus Phase?
9 weeks to birth (end of first and all of 2nd and 3rd)
What important things develope during the fetus phase?
3rd Month- sex organs fully shaped by 12th week
all body parts present
Fetus Can move and weighs 3 ounces and is 2 inch long
Preparing to survive Month 4-6 key importance?
Digestive and excretory systems
new neurons develop (neurogenesis)
Synapses- connection between neurons (synaptogenesis)
Final 3 Months:
Maturation of the respriatory and cardiovascular systems
Name some complications with pregnancy?
Tertogens, timing: consider critical periods, Amount: exposure to multiple teratgens, Genetics: Nature/ Nurture interactions