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Flashcards in Diagnosis of Preg Deck (26):
1

what is naegele's rule?

lmp plus one year minus 3 months plus seven days - remember this is used to help calculate the EDC (estimated date of confinement aka due date)

2

what is it called when the cervix begins to soften in the early stages of pregnancy? (IOW the cervix goes from feeling like cartilage to lips)

Hegar's sign

3

by what week of pregnancy does the fundus of the uterus become palpable above the pubic symphysis?

week 12

4

describe the change in cervical mucus during pregnancy

goes from fernlike pattern to beaded/cellular pattern

5

which hormone is responsible for the fernlike pattern of cervical mucus?

estrogen (increases sodium chloride)

6

which hormone is responsible for the beadlike/cellular pattern of cervical mucosa?

progesterone (decreases sodium chloride)

7

what happens to the vaginal mucosa color during pregnancy?

increase in blood flow causes vagina to appear dark bluish or purplish-red

8

the bluish discoloration of the vaginal and cervical mucosa due to vascular congestion during pregnancy is called what?

chadwick's sign

9

first fetal movements felt by the mother are called what?

quickening

10

what happens to maternal hair growth during pregnancy?

Prolonged anagen - the active growth phase of hair follicles.

11

the fundal height at the level of the umbilicus if the equivalent of how many weeks gestation?

20 weeks

12

why is it that the fundal height at 40 weeks tends to be less than at 36 weeks?

engagement and descent of fetal head accounts for this

13

a gestational sac should be seen inside the uterus on TVU at which hcg level?

at least 1500 mIU/ml

14

what is the role of hcg in early pregnancy?

supports the corpus luteum which produces progesterone which helps to support early pregnancy - remember, do NOT assay for hcg until a woman has missed her menstrual period

15

hcg peaks at what week of gestation?

10 weeks

16

for how long does hcg help to sustain the corpus luteum? what happens after this point in time?

first 7 weeks - after which point the placenta makes its own hormones to sustain the pregnancy

17

if hcg levels are greater than 1500 but there is no evidence of intrauterine pregnancy via TVUS what should you begin to think?

ectopic pregnancy

18

what is the preferred method to diagnose normal pregnancy? urine or plasma hcg

urine!

19

at what time of day is best to collect urine for hcg levels? why?

early morning b/c hcg concentration is highest in the AM

20

what are two situations in which a urine hcg will give you a false positive?

proteinuria and UTI

21

what is the range of normal fetal heart rate?

110 to 160

22

is early or late pregnancy ultra more accurate in establishing the EDD?

early

23

an US done in T1 can vary by how many days in terms of predicting EDD?

approx. 4 days

24

an US done in T2 can vary by how many days in terms of predicting EDD?

approx. 14 days

25

an US done in T3 can vary by how many days in terms of predicting EDD?

approx. 21 days

26

t or f: ultrasound measures the gestational age of the fetus

FALSE! u/s only measures the size of the fetus NOT the gestational age