ASSESSMENT OF FETAL GROWTH AND DEVELOPMENT Flashcards
HEALTH HISTORY
Nutritional intake
Personal habits
HISTORY OF ACCIDENTS, INTIMATE PARTNER ABUSE
a symphysis-fundal height measurement
McDonald’s Rule
the distance from the uterine fundus to the
symphysis pubis in centimeters is equal to the
week of gestation between the _____ and _____
weeks of pregnancy.
20TH
31ST
Typical measurements
12 weeks -the _______ ______
20 wks - At the ________
36 wks - At the _________ _______
Typical measurements
12 weeks -the symphysis pubis
20 wks - At the umbilicus
36 wks - At the xiphoid process
fetal movement that can be felt
by the mother
quickening
– occurs at approximately 18 to 20 weeks of
pregnancy and
– peaks in intensity at 28 to 38 weeks.
Quickening
A healthy fetus moves with a degree of
consistency, or at least
10 times a day.
The Sandovsky Method
• ask the woman to lie in a left recumbent
position after a meal and
• record how many fetal movements she feels
over the next hour
• a fetus normally moves a minimum of twice
every 10 minutes or an average of 10–12
times an hour.
• If less than 10 movements occur within an
• hour, the woman repeats the test for the next
hour.
The Cardiff method (“Count-to-Ten”)
a woman records the time interval it takes for
her to feel 10 fetal movements within 60
minutes.
Fetal Heart Rate
120 to 160 beats per minute throughout
pregnancy.
Methods of acquiring FHR:
✓Rhythm Strip Testing
✓Nonstress Testing
✓Vibroacoustic Stimulation
✓Contraction Stress Testing
assessment of the fetal heart rate for whether a good baseline
rate and a degree of variability are present.
Rhythm Strip Testing
refers to the average rate of the
fetal heartbeat per minute.
Baseline reading
refers to small changes in rate that occur if
the fetal parasympathetic and sympathetic nervous
systems are receiving adequate oxygen and
nutrients
Variability
Rhythm Strip Testing CATEGORY
1) absent (none apparent);
2) minimal (extremely small fluctuations);
3) moderate (amplitude range of 6–25
beats per minute);
4) marked (amplitude range over 25 beats
per minute)
measures the response of the fetal heart
rate to fetal movement
Nonstress Testing
TEST RESUlTS FOR Nonstress Testing
- Reactive
– if two accelerations of fetal heart rate (by 15 beats or
more) lasting for 15 seconds occur after movement within
the chosen time period. - Nonreactive
– if no accelerations occur with the fetal movements.
– The results also can be interpreted as nonreactive if no
fetal movement occurs
– or if there is low short-term fetal heart rate variability (less
than 6 beats per minute) throughout the testing period
a specially designed acoustic stimulator is applied to
the mother’s abdomen to produce a sharp sound of
approximately 80 decibels at a frequency of 80 Hz,
Vibroacoustic Stimulation
the fetal heart rate is analyzed in conjunction with
contractions.
Contraction Stress Testing
Contraction Stress Testing test result
• Negative (normal)
– if no fetal heart rate decelerations are present
with contractions.
• Positive (abnormal)
– if 50% or more of contractions cause a late
deceleration (a dip in fetal heart rate that occurs
toward the end of a contraction and continues
after the contraction)