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OB1 > Fertilization + Implantation > Flashcards

Fertilization + Implantation Flashcards

1
Q

What day does fertilization occur and where

A

approx day 14, ampulla of fallopian tube

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2
Q

What is the zona reaction

A

When the sperm makes the zona pellucida impermeable to other sperm

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3
Q

A zygotes next cell stage is

A

Morula

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4
Q

A morula’s next cell stage is

A

Blastocyst

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5
Q

Blastocyst is broken down into

A

Embryoblast and trophoblast

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6
Q

Embryoblast eventually becomes the

A

embryo

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7
Q

Trophoblast eventually becomes the

A

Placenta

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8
Q

Embryoblast and trophoblast are AKA

A

Inner and outer cell masses

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9
Q

The amniotic cavity forms within which cell on what day?

A

Inner cell/embryoblast, day 22

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10
Q

The embryo completely implants into the endometrium on what day

A

23

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11
Q

The primary yolk sac forms on what day

A

23/24

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12
Q

Maternal-placental circulation is established on what day

A

23/24

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13
Q

Chorionic cavity forms on what day

A

25/26

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14
Q

Secondary yolk sac is formed on what day

A

26/27

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15
Q

Bilaminar embryonic disc appears on what day

A

28/29 (4 weeks)

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16
Q

Once fertilization occurs, the endometrium is termed ____

A

decidualized

17
Q

What are the 3 layers of decidua

A

Basalis, capsularis, parietalis

18
Q

Describe decidua basalis

A

point of deepest attachment, forms the placenta

19
Q

Describe decidua capsularis

A

Decidua that surrounds the blastocyst

20
Q

Describe decidua parietalis/vera

A

on the opposite side of uterine cavity/implant site

21
Q

The chorionic villi that are the conceptus’ contribution to the placenta are called

A

Chorionic frondosum

22
Q

bHCG is produced by

A

syncytiotrophoblasts

23
Q

bHCG preserves the ____ and keep _____ levels high to prevent menstruation

A

CLC, progesterone

24
Q

bHCG levels should roughly ______ every 48hrs in a normal pregancy

A

double

25
Q

Failure to detect an IUGS by EV when bhcg 2000-3000 indicates risk for

A

ectopic

26
Q
A

OB1 (8 decks)

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