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Flashcards in normal 1st trim. pt.1 Deck (36):
1

What day is ovulation in a 28 day cycle?

Day 14

2

How long after ovulation does fertilization occur?

24 to 36 hours

3

Where does ovulation most commonly occur?

Ampulla of the fallopian tube ( rapid cell division occurs here )

4

How many chromosomes does each fertilized egg contain?

46 chromosomes (23 pairs)

5

What is the male and female reproductive cell (the ovum and sperm) called?

Gamate

6

The single cell fertilized egg prior to cell division

Zygote

7

Dividing fertilized egg at 2 cell and 4 cell stages

blastomere

8

Where is the blastomere located?

Within the ampulla of the fallopian tube

9

The mass of dividing cells which resemble a Mulberry

Morula

10

Where is the morula located?

in the isthmus of the tube and entering the uterus

11

An organized collection of cells which implant into the endometrium about 7 days after fertilization.

blastocyst

12

What produces the progesterone to keep the uterine lining stable?

Corpus luteum

13

What produces beta human chorionic gonadotropin or BhCG which perpetuates the life of the corpus luteum?

trophoblast (found in the outer lining)

14

What is the inner fluid filled cavity called that contains the intercell mass?

Blastocele

15

******What will the inner cell mass inside the blastocyst become?********* KNOW THIS

Yolk sac and embryonic disk and amnion

16

What is the glycoprotein called that is produced by the trophoblastic cells initially, and later by the placenta?

HCG human chorionic gonadotropin

17

How is BhCG detected?

In maternal blood and urine

18

What hormone turns a pregnancy test positive?

BhCG

19

When is BhCG detectable in the bloodstream?

7-10 days after ovulation, 3 weeks after LMP

20

What glycoprotein doubles every 2-3 days and plateaus at 8-9 weeks then declines?

HCG

21

How can BhCG be measured? 2 ways

Qualitative and Quantitative
qualitative--positive or negative
quantitative--specific number

22

What is the most common way the laboratory reports beta hCG levels?

with the 3rd international reference preparation
3rd IRP

23

What is the formula for the 2nd IRP?

2nd IRP= IRP/2

24

What is the formula for the 3rd IRP?

3rd IRP= 2 x SIS (second international standard)

25

In the blastocyst cavity, the inner cell mass is differentiated from the bilaminar disc (2 layer) into what?

Trilaminar embryonic disk (3 layer)

26

What are the 3 germ layers that comprise the embryonic disk by 5 weeks after LMP?

Endoderm, Mesoderm, Ectoderm

27

The innercell layer (of embryonic disk)

Endoderm

28

The middle layer ( of embryonic disk)

Mesoderm

29

The outer layer (of embryonic disk)

Ectoderm

30

What does the endoderm become?

GI and respiratory systems

31

What does the mesoderm become?

Musculoskeletal and circulatory systems

32

What does the ectoderm become?

brain and nervous system and skin

33

When do all major internal and external structures begin to form?

6-10 weeks of fetal life

34

When does the fetal heart begin to beat?

6 weeks

35

What are we referring to when we say "week of fetal life"

1st day of last mestrual period

36

What does the trophoblast of the blastocyst become???? **********KNOW

Chorion