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How soon after conception does implantation occur?
What is a common symptom?
7-10 days after conception
light spotting/bleeding = implantation
Discuss lengths of pregnancy in the following terms;
lunar months
calendar months
weeks
days
lunar: 10
calendar: 9
weeks: 40
days: 280
EDC vs EDD vs EDB
**all mean the same thing**
estimated date of confinement
ED of delivery
ED of birth
EDC is _______ from LNMP
EDC is 40 weeks from LNMP
Conception occurs in the ________
aka
ampula
aka outer 1/3 of the fallopian tube
, Define Wharton's jelly
tough, fibrous material covering cord protecting from compression
Discuss the different sides of the placenta; mom vs baby
mom: rough & red
baby: smooth & white
How much amniotic fluid should there be by term?
700-1000mL
oligo <500mL
poly>2000mL
Define oligohydramnios vs polyhydramnios
Causes? (3 each)
oligo: <500mL, ∵ respiratory issue, renal issue, placental insufficiency (later in preg)
poly: >2000mL, ∵ maternal diabetes, NTD, chromosomal defects
Discuss circulation of the cord
2 arteries carries AWAY from fetus
1 vein carries TO fetus
Define dates of the embryonic period
What is important to remember?
embryonic = day 15 - week 8
most vulnerable stage!
What is the most vulnerable stage of fetal development?
embryonic
day 15 to week 8
caution for teratogens!