ch 10 fetal development and genetics Flashcards
the nurse is teaching a couple about the pros and cons of genetic testing. Which statement by the nurse best describes the limits of genetic testing?
some genetic tests can give a probability for developing a disorder
the nurse is counseling a couple who suspect that they could bear a child with a genetic abnormality. what would be the most important for the nurse to do when working with this family?
present the information in a factual, non directive manner
the nurse is teaching a couple about x-linked disorders because they are concerned that they might pass on hemophilia to their children. which response indicates the need for further teaching?
if the father doesn’t have it, than his kids won’t either
a pregnant woman undergoes a triple screen at 16 to 18 weeks gestation. what would the nurse suspect if the woman’s estriol and alpha-fetoprotein levels are decreased with high hCG levels?
down syndrome
the nurse is conducting a presentation for a young adult community group about fetal development and pregnancy. the nurse determines that the teaching was successful when the group identifies the sex of offspring is determined at which time?
at fertilization
during a prenatal visit, a pregnant woman says, I know the amniotic fluid to a pregnant woman, which description would the nurse most likely include?
this fluid acts as a cushion to help to protect the baby from injury
assessment of a pregnant woman reveals oligohyrdramnios. the nurse would alert for the development of which condition?
placental insufficiency
a couple comes to the clinic for preconception counseling and care. as part of the visit, the nurse teaches the couple about fertilization and initial development, stating that the zygote formed by the union of the ovum and sperm consists of how many chromosomes?
46
after teaching a pregnant woman about the hormones produced by the placenta, the nurse determines that the teaching was successful when the woman identifies which hormone produced as being the basis for pregnancy tests?
human chorionic gonadtropin (hCG)
when desiring genetic disorders to a group of couples planning to have children, the nurse would identify which as an example of an autosomal dominant inheritance disorder?
Huntington disease
which mother is in the fetal stage of development?
a pregnant mother who is 30 weeks pregnant
which event will result in zygote formation?
the nucleus of the ovum and sperm make contact and combine chromosomes
when describing gender determination at a prenatal class, the nurse would include which statement?
gender is determined at fertilization when the ovum is fertilized
during a prenatal class, the nurse is describing what happens when the ovum is fertilized by the sperm. which statement would the nurse most likely include?
the zygote is transported into the uterine cavity
which processes that occur after fertilization would lead to a normal pregnancy? select all that apply.
-the morula divided into specialized cells that will form fetal structures
-within the morals is a blastocyst that will form the embryo
-the morula enters the uterine cavity about 72 hours after fertilization
which processes, if they occur during the formation of the placenta, would lead to a successful pregnancy? select all that apply
-implantation of the trophoblast occurs in the upper uterus
-three days after conception, the throphoblast makes human chronic gonadtropin (hCG)
-the throphoblast develops into the placenta
which characteristics about amniotic fluid would alert the prenatal nurse to further investigate? select all that apply
-oligohydraminos is noted on the assessment
-polyhyramnios is noted on the assessment
-the client has approx 2 L of amniotic fluid at term
a clients recent prenatal ultrasound assessment reveals a normal placenta. which outcomes would the nurse expect? select all that apply
-the hormones made by the placenta support fetal growth
-the placenta protects the fetus from an immune attack created by the mother
-the placenta produces hormones that ready the fetus for extrauterine life
a prenatal nurse is conducting a class on healthy pregnancy and explains the role of placental hormones. Which statements would the nurse make? select all that apply
-human chorionic gonadotropin is the basis for pregnancy tests
-human placental lactogen participates in the development of maternal breasts for lactation
-progesterone stimulates maternal metabolism and breast development
-estrogen causes enlargement of a woman’s breasts
a client at a prenatal class requests information on how the gender of a baby is determined. which statement made by the nurse would be most accurate?
gender is determined at conception an depends on whether the ovum is fertilized by a y bearing or an x bearing sperm
a client who is six weeks pregnant asks the prenatal nurse, what development has taken place with my baby now? which information should the nurse include in the response?
-by week 3 there would be the beginning development of the brain, spinal cord, and heart
-by week 4 the arms and legs begin to grown and develop
-by week 5 the heart now beats and eyes and ears can be seen
-by week 6 the lung begin forming and the baby’s circulation is established
at a prenatal class, the participants ask the nurse who would benefit from genetic counseling. which responses by the nurse are correct? select all that apply
-a woman whose husband is age 50 or older
-a woman who has been exposed to teratogens
-a woman who receives an abnormal alpha-fetoprotein result
in order for conception to take place, it is most common for a woman to get pregnant:
two weeks after her normal menstrual period
a couple asks the nurse at a preconception class for information on becoming pregnant. which response by the nurse is correct?
the 200 million sperm in ejaculated semen are necessary for conception to take place
a couple attends genetic counseling. what are the chances that the couple will have a child with down syndrome?
chromosomal abnormalities occur in about 1 in 150 live born infants
the nurse is assessing a 12 hour old newborn and hears a heart murmur. what initial action should the nurse take?
document the finding as normal for age
a client asks about a child inheriting an autosomal recessive disorder. what must occur for an offspring to demonstrate s/s of the disorder with this type of inheritance?
both parents must be carriers
at prenatal classes a client asks the nurse how long it takes to actually become pregnant after intercourse. what is the best response from the nurse?
conception happens immediately after fertilization of the ovum
a nurse teaching a couple says that when x linked recessive is present in a family, the genoa ram will reveal that:
mostly males in the family have that disorder
a woman visits the prenatal clinic and is noted to have oligohydramnios. the client asks which this fluid is important. which statements would be included in the nurse’s response? select all that apply:
-amniotic fluid helps maintain your baby’s body temperature
-too little amniotic fluid is linked with placental problems
-it acts like a cushion protecting your baby from trauma that may occur
