100ft view pregnancy Flashcards

1
Q

What layer of the endometrium in involved with implantation

A

stromal cells

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2
Q

How many sperm are released in male ejaculation

A

500 million

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3
Q

What is included in ejaculation

A

Prostaglandins
*causes uterine contraction to propel them upward

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4
Q

What is the pH of sperm

A

7.5

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5
Q

Where is sperm formed

A

vas defrens

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6
Q

Where does the fluid of the semen come from

A

seminal vesicles and prostate

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7
Q

How long do sperm live

A

24-48 hours (at body temperature)

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8
Q

What does the heavy cholesterol coating around the head of the sperm help with

A

Allows for influx of ca2+ so the flagellum are more motile

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9
Q

What is the coronal radiata

A

Remaining follicular cells after the release of the ovum from Graafian follicle

*contained carbs for ovum as well as hylauronic acid

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10
Q

What is capacitation

A

The outer layer of the sperm head is broken down so it can get through the ovum wall

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11
Q

What is the zona pellucid

A

layer of glycoprotein that prevent multiple sperm from binding

*initiates sperm captation

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12
Q

Where does fertilization generally occur

A

in the ampuls of the fallopian tube

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13
Q

What is released from the acrosome

A

hyaluronidase
proteolytic enzymes

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14
Q

What happens once a sperm has entered the ovum

A

The cell depolarizes so no other sperm are able to enter

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15
Q

What is the deciding gene for sex

A

SRY on the Y chromosome
*+= male

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16
Q

What is contained within a blastocyst

A

wall and embryonic pole

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17
Q

What does the pole in the blastocyst become

A

the embryo

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18
Q

How many days after fertilization does the blastocyst implant

A

6 days

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19
Q

What occurs to the corpus luteum when an ovum is fertilized

A

The placenta keeps it active for the first trimester instead of allowing it to degrade

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20
Q

When in a normal cycle does implantation occur

A

16-22 days

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21
Q

Where is the most common location for implantation

A

upper/posterior wall

22
Q

What is trophectoderm

A

The blastocyst separates into the embryo and the placenta

23
Q

What does the trophoblast do

A

cause destruction and rebuilding of the spiral arteries so that blood flow cn be maintained from mom to fetus during development

24
Q

Which cells are responsible for secreting HCG

A

Trophoblastic

25
Q

What do stroll cells secrete for the developing fetus

A

glycogen
proteins
lipids

26
Q

When does the placenta develop for function

A

Day 16

27
Q

What does the fetus want for energy

A

glucose

28
Q

What is the inner layer of the trophoblast

A

amnion

29
Q

What is the chorion

A

the outer layer of trophoblast

30
Q

When is the hypothalamus/pituitary developed

A

12th week

31
Q

When does the fetal heart begin to contract

A

day 21

32
Q

How much more O2 does fetal hemoglobin have

A

20-50% more

33
Q

Why is there an increase in estrogen at the end of pregnancy

A

to get ready for labor

34
Q

Why is progesterone elevated during pregnancy

A

to help prevent contractions

Breast development

35
Q

What is the benefit of HCG lab work

A

to check trending to see if pregnancy is still occurring or not

36
Q

How much is a normal amount of amniotic fluid

A

500-1000mL

37
Q

What fluid makes up majority of amniotic fluid

A

fetal renal function

38
Q

How fast does fluid within the amniotic sac get exchanged

A

every 3 hours

39
Q

How much does estrogen increase with pregnancy

A

30x above

40
Q

What does estrogen help with during fetal development

A

Increase breast tissue
increase tissue laxity
appropriate uterine enlargement
increase external genitalia

41
Q

What secretes estrogen during pregnancy

A

syncytial trophoblastic cells of placenta

42
Q

What secretes progesterone during pregnancy

A

corpus luteum and then the placenta later in pregnancy

43
Q

What happens to moms pituitary during pregnancy

A

Increases 50% in size
increase ACTH, TRH, Prolactin

44
Q

Why are glucocorticoids increased during pregnancy

A

to increase amino acid levels to be used by fetal tissue

45
Q

Why do women become edematous during pregnancy

A

increased aldosterone secretion = Na+ reabsorption = fluid retention

46
Q

Why do the thyroid and parathyroid increase in size during pregnancy

A

Hcg and placenta causes an increase in thyroid hormone demand

47
Q

How much does CO increase

A

30-60% in first trimester

48
Q

What are the side effects of increased hCG and progesterone

A

N/V associated with relaxed stomach muscles, decreased GI motility

49
Q

When can fetal movements typically been felt

A

20weeks

50
Q

When does the fetus grow the mouth

A

the last 2 months

51
Q

How much does moms blood volume increase in the third trimester

A

30%