Lesson 1 Flashcards by Tristan Wiebe

vagina is like an..

acordian

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how many eggs

1-2 million

only 300 make it close to the end

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LMP

last menstrual period

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gravida

of pregnancies

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parity

of live births

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endometriosis

when endometrial tissue grows outside the uterus

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1st trimester

1-12 weeks

egg meets sperm
uterine line thickens
ovulation has taken place

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2nd trimester

13-27 weeks

sex becomes apparent
bones develop
hair is visible
ears form

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3rd trimester

28-40 weeks

bones are fully developed
eyes open
weight gain (chubby limbs)
CNS is matured

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weeks 1-2

not actually pregnant

40 weeks from last period is due date

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week 3

fertilization
happens in ampulla
forms zygote
zygote travels to uterus via fallopian tubes
morula becomes blastocyst

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weeks 4

major organ formation 
implantation 
uterus has 2 sections trophoblast and embryo blast 
blastocyst becomes implanted
placenta forms

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outer mass of uterus

trophoblast

nourish and protect

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inner mass of uterus

embryo blast

becomes embryo

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placenta

serves as an early liver 
gas exchange 
heat transfer
waste removal 
"endocrine gland"

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umbilical cord

2 arteries
1 vein
connects placenta to fetus

amniotic sac

fetus swallows it and passes out waste

fetal circulation

umbilical vein - oxygenated blood
umbilical arteries - deoxygenated blood
bypass lungs until birth

week 5

egg is now embryo

embryo layers

endoderm
mesoderm
ectoderm

what trimester has the most miscarriages?

first one

week 37

head descends to pelvis

cervix

mucus plug

maternal changes ovaries

inhibited ripening of the follicles

maternal changes uterus

``` most significant changes happen here 35cm long (from 8) weighs 1kg (from 2g) holds 5000ml (from 10ml) ```

uterus sizes 7 weeks 10 weeks 12 weeks

egg orange rises out of pelvis

t/f RBC and WBC decrease with pregnancy

F! increase

what part of the heart grows during pregnancy

left ventricle

how much does HR increase

15-20 BPM

labour position

supine knees apart CO can increase 25% from uterine contractions

how much does maternal oxygen demand increaser by?

20%

TV increases by...

30% at first then 40-50%

pregnancy weight gain

11-16kg

relaxin

hormone | collagenous tissues soften