CH 47 - 1ST TRIMESTER Flashcards Preview

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Flashcards in CH 47 - 1ST TRIMESTER Deck (36)
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0
Q

CLINICIANS AND SONOGRAPHERS USE ______ TO DATE PREGNANCY. WHICH IS THE 1ST DAY OF ___.

A

GESTATIONAL AGE

LMP

1
Q

THIS IS USED BY EMBRYOLOGIST USE THIS TO ASSESS GA.

A

CONCEPTUAL AGE

2
Q

THE FIRST 4 WKS THE CONCEPTUS IS CALLED __.

A

ZYGOTE

3
Q

IN WEEKS 4 -10 THE CONCEPTUS IS CALLED AN _____.

A

EMBRYO

4
Q

AFTER 10 WEEKS THE EMBRYO IS CALLED THE ______.

A

FETUS

5
Q

WHAT DAY IS A MATURE OVUM RELEASED?

A

DAY 14

6
Q

HOW LONG DOES FERTILIZATION OCCUR AFTER OVULATION?

A

WITHIN 1 - 2 DAYS

7
Q

THE ___ FOLLICLE COLLAPSES AND BECOMES THE ____ ____ WHICH SECRETES 2 HORMONES; ____ & ___.

A

GRAAFIAN
CORPUS LUTEUM
PROGESTERONE & ESTROGEN

8
Q

A FERTILIZED OVUM BECOMES A __ AND RAPIDLY DIVIDES TO FORM THE 16 CELL ___; THEN FORMS THE ______.

A

ZYGOTE
MORULA
BLASTOCYST

9
Q

TROPHOBLASTIC CELLS SECRETE _____ _____ ____ AND STIMULATES MATERNAL PREGNANCY RESPONSES.

A

HUMAN CHORIONIC GONADOTROPIN

10
Q

TROPHOBLAST FORMS THE ____ ____ (EARLY GESTATIONAL SAC).

A

PRIMARY VILLI

11
Q

THE SECONDARY YOLK SAC IS FORMED AROUND ____ DAYS MENSTRUAL AGE.

A

23

12
Q

A NML GA SAC CAN BE TRANSABD WHEN THE HCG LEVEL IS ? IT CAN BE SEEN EV AT?

A

> OR = TO 1800mIU

500 mIU

13
Q

WHAT mIU/ml LEVEL INDICATES PREGNANCY AND WILL RULE OUT ECTOPIC?

A

1000-2000

14
Q

HCG DOUBLES EVERY?

A

3.5 DAYS

15
Q

GA SAC SIZE & HCG LEVELS INCREASE PROPORTIONATELY UNTIL ____ WEEKS.

A

8

16
Q

DURING THE 5TH WK THE GS GROWS….

A

1 MM PER DAY IN EARLY PREGNANCY

17
Q

HOW IS A 5 WK GS POSITIONED IN THE FUNDUS?

A

ECCENTRICALLY

18
Q

DURING THE 5TH WEEK WHAT SHOULD BE VISUALIZED?

A

DOUBLE DECIDUAL SAC SIGN

19
Q

AT 5 TO 5.5 WKS THE GS SHOULD MEASURE?

A

> 12MM

20
Q

WHAT ARE THE FCTNS OF THE SECONDARY YOLK SAC?

A
  • PROVIDE NUTRIENTS
  • DEVELOP THE PRIMITIVE GUT
  • HEMATOPOISES
21
Q

HOW IS THE YOLK SAC ATTACHED TO THE EMBRYO?

A

BYA STALK BETWEEN THE AMNION AND CHORION.

22
Q

WHEN IS THE YOLK SAC REABSORBED AND NO LONGER SEEN?

A

AT 12 WEEKS

23
Q

WHEN DOES ORGANOGENESIS BEGIN?

A

AT 5 WEEKS.

24
Q

HOW EARLY CAN HEART MOTION BE DETECTED?

A

5.5 WEEKS AND CRL AT 3MM

25
Q

WHAT IS THE TRILAMINAR DISC FOLD AND WHEN DOES THIS OCCUR?

A

IT IS WHEN THE EMBRYO FOLDS INTO A C SHAPE THAT FORMS THE EMBRYONIC HEAD, CAUDAL PORTIONS, AND LATERAL FOLDS.
STARTS AT 6 WEEKS

26
Q

THE MIDGUT ELONGATES AND HERNIATES INTO THE BASE OF THE UMBILICAL CORD. WHEN DOES IT RETURN TO THE FETAL ABDOMEN?

A

10-11 WEEKS

27
Q

BY ____ WEEKS THE ECHOGENIC BOWEL RETURNS TO THE FETAL ABDOMEN.

A

12 WEEKS

28
Q

AT 6 WEEKS THE BRAIN HAS 3 PRIMARY VESICLES. WHAT ARE THEY?

A

PROSENCEPHALON
MESENCEPHALON
THOMBENCEPHALON

29
Q

THE RHOMBENCEPHALON FURTHER DIVIDES INTO 2 SEGMENTS:

A

METENCEPHALON (CEPHALIC PORTION)

MYELENCEPHALON (CAUDAL PORTION)

30
Q

AT ___ WEEKS THE CHORIOD PLEXAS & FALX IS SEEN.

A

9

31
Q

WHEN IS THE MOST ACCURATE GESTATIONAL DATING DETERMINED?

A

DURING THE 1ST TRIMESTER

32
Q

WHAT ARE THE 2 PARAMETERS USED FOR GA?

A

GS SIZE

CRL

33
Q

HOW DO YOU GET THE MEAN SAC DIAMETER?

A

L+W+H/3

34
Q

2 OVA AND 2 SPERM =

A

DIZGOTIC TWIN (70% OF TWIN PREGNANCIES)

35
Q

1 OVA AND 1 SPERM =

A

MONOAMNIOTIC

50% MORTALITY RATE