EXAM 1 Flashcards
What is a teratogen? Examples?
- any drug, virus, infection, of other exposure that impacts fetal development
examples: tobacco, alcohol, drugs, ACE inhibitors, anticonvulsants, cat feces (toxoplasmosis), heat (hot tub), varicella/Zika/rubella
When is exposure to teratogens most harmful to the fetus?
during the first 8 weeks of gestation (this is the MOST CRITICAL timeframe)
When does the zygote embed into the uterus?
-about day 7
**What is the umbilical cord composed of?
2 arteries
1 vein
How much amniotic fluid is there at most?
800-1000ml (at around 34 wks)
*it decreases at term to 500-600ml to make room
What prenatal vitamins are most important? (5)
- folic acid
- iron
- calcium
- magnesium
- vitamin D
**What are presumptive signs of pregnancy? (6)
- amenorrhea
- N/V
- breast changes
- fatigue
- urinary frequency
- quickening
**What are probable signs of pregnancy? (7)
- Chadwick’s sign
- Goodell’s sign
- Hegar’s sign
- abdominal growth
- skin changes (melasma, linea nigra)
- ballottement
- positive pregnancy test
**What are signs that pregnancy is confirmed? (3)
- auscultation of the fetal heart (10-12 weeks)
- observation/palpation of fetal movement (by provider)
- ultrasound exam (4-8 weeks can confirm)
What is Chadwick’s sign?
-bluish color of the cervix and vaginal mucosa
What is Goodell’s sign?
-softening of the cervical tip
What is Hegar’s sign?
-softening of the lower uterus
How do we calculate the EDD (estimated due date)?
Nagele’s Rule
-first day of the last menstrual period - 3 months + 7 days
*if LMP is not known US or pelvic exam may give an estimate
What is gravidity?
-the number of pregnancies that woman has had
What is parity?
-the number of pregnancies in which the fetus or fetuses reached 20 weeks
How many weeks is considered preterm?
-up to 37 weeks
**What is the acronym GTPAL for?
G- gravida T- term P- preterm A- abortion L- living children
During the first trimester, how is the mother psychologically reacting?
-she reacts with AMBIVALENCE
“I’m pregnant?!”
During the second trimester, how is the mother psychologically reacting?
-she reacts with EXCITEMENT
“Look everyone! I’m pregnant!”
During the third trimester, how is the mother psychologically reacting?
-she reacts by PREPARING
“Wait! I’m not ready!”
Where is HCG produced early in pregnancy and what does it do?
- produced by the ovaries initially
- supports implantation and establishment of pregnancy
When is urinary urgency and frequency most often noted during pregnancy?
-in the first and third trimester
What cardiovascular changes occur in the pregnant woman?
- cardiac output increases 30-50%
- HR increases 15-20 bpm
- RBC increase by 30%
- blood volume increases by 18-30%
What is supine hypotension and how do we correct it?
- when the pregnant woman lies on her back it partially occludes the inferior vena cava and the aorta
- correct it by assuming a lateral position
What week is the fundal height at the umbilicus?
- 20 weeks, or halfway
* by 36 weeks it is at the xyphoid process*
**What is the recommended weight gain for an underweight pregnant woman?
underweight BMI: <18.5
weight gain: 28-40 lbs
**What is the recommended weight gain for a normal weight pregnant woman?
normal BMI: 18.5-24.9
weight gain: 25-35 lbs
**What is the recommended weight gain for an overweight pregnant woman?
overweight BMI: 25-29.9
weight gain: 15-25
What are the s/s that the pregnant woman should report during her first trimester? (6)
- abdominal cramping/pain (persistent)
- vaginal spotting/bleeding
- absence of FH tone
- dysuria, frequency. urgency
- fever, chills
- prolonged N/V
What does AFP test for and when is it typically done?
MSAFP (maternal serum alpha-fetoprotein) is done at 15-20 weeks to rule out:
- Down Syndrome: low levels
- down low*
- neural tube defects such as anencephaly or spinal bifida: high levels
What is GTT test for and when is it typically done during pregnancy?
- GTT (glucose tolerance test) is done at 24-28 weeks to detect gestational diabetes
- *a result greater than 140 requires followup for a fasting GTT
What is rH screening test for during pregnancy and when is it typically done?
-it determines the risk for maternal-fetal blood incompatibility and it is done at 28 weeks
What is GBS testing for and when is it typically done during pregnancy?
GBS (group B streptococcus) testing happens at 37-38 weeks to assess for infection
How to perform a fetal kick count?
2 hr time period (preferably after meals) should feel at least 10 distinct movements
What is a normal FHR?
a normal fetal heart rate is 110-160
What is Leopold’s maneuver?
specific palpation of the abdomen to determine the position of the fetus
What are the s/sx of preterm labor? (5)
- rhythmic lower abdominal pain/cramping
- low backache
- pelvic pressure
- leakage of amniotic fluid
- increased vaginal discharge
**What are Reva Rubin’s maternal tasks of pregnancy? (4)
- ensuring safe passage for herself and her child
- ensuring social acceptance of her child
- attaching or “binding in” to the child
- giving of oneself to the demands of being a mother
What is couvade?
couvade which is pregnancy s/s in men
What is chorionic villus sampling? When is it done? Pros/Cons?
- diagnostic test to detect fetal chromosomal, metabolic, or DNA abnormalities
- performed at 10-13 weeks
Pros- results are faster than amniocentesis
Cons- 1% risk of loss of pregnancy, limb reduction defects may happen if done at less than 10 weeks
What is amniocentesis? When is it done? Pros/Cons?
- diagnostic test to detect chromosomal, metabolic, or DNA abnormalities AS WELL AS fetal lung maturity, and fetal infections or amniotic fluid disorders
- performed at 15-20 weeks
Pros- its been around for a long time
Cons- test results not available for 10-14 days, pregnancy loss 1%
What is percutaneous umbilical blood sampling? When is it done?
- aspiration of fetal blood from the umbilical cord (also called cordocentesis)
- done at 18 weeks
RISKY: fetal bradycardia, bleeding, thrombosis, infection, preterm labor, pregnancy loss
What does a fetal nonstress test do? What is considered a good result?
- it observes the FHR in response to fetal movement
- FHR going up when the baby is moving is a good sign
Results: reactive is good, nonreactive is bad
What is a CST test for? When would is be used during in pregnancy?
Contraction Stress Test: records FHR in response to uterine contractions
-used when NST findings are nonreactive