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OB > Lecture 3 > Flashcards

Lecture 3 Flashcards

1
Q

Conception is with

A

2nd degree oocyte (mature ovum) + spermatozoon

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2
Q

Conception occurs ___ - _____ hours of ovulation

A

24-36

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3
Q

Best days of cycle for conception

A

14 to 15

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4
Q

Conception forms

A

A single cell zygote

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5
Q

Conception occurs within the ______ region of fallopian tube

A

Ampullary

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6
Q

Zygote has how many chromosomes

A

46

Diploid number

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7
Q

Explain the chromosome breakdown

A

22 autosomal and 1 pair of ssex chromosomes

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8
Q

Each parent contributes ____ chromosomes

A

23

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9
Q

The conceptus is developing as it travels through

A

Fallopian tube

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10
Q

Cleavage

A

Zygot rapidly divides, each division cells double and become smaller

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11
Q

Size of zygote =

A

Size of morula

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12
Q

What is morula

A

12-15 cells

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13
Q

Morula will develop a fluid filled cavity call

A

Blastocyst cavity or blastocele

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14
Q

The conceptus at day 5 is called

A

Blastocyst

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15
Q

Blastocyst aka

A

Blastula

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16
Q

3 distinct parts of the blastocyst

A

Trophoblast
Embryoblast/ ICM
Blastocele

17
Q

What does trophoblast do

A

Makes future placenta (embryonic part)

Produces HCG that supports CL

18
Q

What does Embryoblast/ICM do

A

Will develop into embryo

19
Q

What is Blastocele

A

Fluid filled cavity

20
Q

Blastocyst implants on day ___-___ of lmp

A

20-23

21
Q

Blastocyst impplants how many days after fertilization

A

5

22
Q

What will the amniotic cavity do

A

Will house the pregnancy within the gestational sac

23
Q

What will chorion develop into

A

Placenta

24
Q

What does yolk sac provide

A

Nutrient to the developing fetus

25
Q

Gastrulation is how many germ layers

A

3 germ cell layers

26
Q

What is the decidua

A

Endometrium during pregnancy

27
Q

What is decidual reaction

A

The changes that occur to the endometrium

28
Q

What is decidual reaction due to

A

Estrogen and progesterone from CL

29
Q

Is decidua always due to intrauterine pregnancy

A

No

30
Q

Decidualized endometrium has hat 3 layers

A

Decidua basalis
Decidua capsularis
Decidua Parietalis/vera

31
Q

Decidua basalis aka

A

Decidual plate

32
Q

Decidua basalis is site of ______ attachment

A

Blastocyst

33
Q

Decidua basalis will develop into ________

A

Maternal portion of placenta

34
Q

Decidua capsularis covers ________

A

Covers the blastocyst and seperates it from the endometrial cavity

35
Q

Decidua parietalis/ vera

A

Remainder of endometrium not directly in contact with the blasatocyst

36
Q

Implantation of the blastocyst can take up to _____ days

A

4

37
Q

During implantation the embyroblast (inner cell mass) develops into

A

Bilaminar embryonic disc and amniotic cavity

OB (23 decks)

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