During preconception counseling, the nurse explains that during the first 8 weeks the fetus is most vulnerable to the effects of teratogens.
What is occurring during the first 8 weeks of gestation?
Placenta formation.
Fertilization.
Organogenesis.
Implantation.
The Correct Answer is C
Choice A rationale
Placenta formation begins shortly after implantation, but it continues to develop throughout the first trimester and into the early second trimester, making it less precise to attribute the
first 8 weeks solely to this process.
Choice B rationale
Fertilization occurs within the first week after ovulation, marking the beginning of pregnancy, but it is a singular event that happens prior to the developmental processes vulnerable to teratogens.
Choice C rationale
Organogenesis is the critical period during which the major organs and structures of the fetus form, typically occurring between the third and eighth weeks of gestation. This is the
time when the fetus is most susceptible to the effects of teratogens, which can cause congenital anomalies.
Choice D rationale
Implantation occurs approximately 6-10 days after fertilization, embedding the blastocyst into the uterine lining. While crucial, it is not the primary period when teratogenic effects are
most significant, as this happens during organogenesis.
Free Nursing Test Bank
- Free Pharmacology Quiz 1
- Free Medical-Surgical Quiz 2
- Free Fundamentals Quiz 3
- Free Maternal-Newborn Quiz 4
- Free Anatomy and Physiology Quiz 5
- Free Obstetrics and Pediatrics Quiz 6
- Free Fluid and Electrolytes Quiz 7
- Free Community Health Quiz 8
- Free Promoting Health across the Lifespan Quiz 9
- Free Multidimensional Care Quiz 10
View Related questions
Correct Answer is A
Explanation
Choice A rationale
Anaphylactoid syndrome of pregnancy (also known as amniotic fluid embolism) occurs when amniotic fluid, fetal cells, hair, or other debris enter the mother's bloodstream, triggering
a serious reaction. It can cause sudden shortness of breath, cardiovascular collapse, and other severe symptoms immediately after a rupture of membranes and is a rare but critical
obstetrical emergency.
Choice B rationale
Abruptio placentae involves the premature separation of the placenta from the uterine wall, which leads to bleeding and potential fetal and maternal distress. However, it does not
typically present with sudden cardiorespiratory collapse or shortness of breath immediately following membrane rupture.
Choice C rationale
Uterine rupture refers to a tear in the wall of the uterus, usually due to trauma, labor stress, or previous surgical scars. While it is a severe condition, it usually presents with
abdominal pain, vaginal bleeding, and fetal distress rather than sudden respiratory failure.
Choice D rationale
Disseminated intravascular coagulation (DIC) is a condition affecting blood clotting processes, often secondary to other conditions like severe preeclampsia, sepsis, or trauma. It
generally presents with bleeding and clotting issues but not sudden respiratory or cardiovascular collapse.
Correct Answer is A
Explanation
Choice A rationale
A respiratory rate of 10/min is concerning as it indicates possible respiratory depression, which can be a side effect of spinal anesthesia. This requires immediate intervention to
prevent hypoxia and other complications.
Choice B rationale
Blood pressure of 100/70 mm Hg is within normal limits and does not require immediate intervention in this context.
Choice C rationale
Urinary output of 30 ml/hr is slightly low, but it is not immediately life-threatening. It may require monitoring and further assessment if it persists.
Choice D rationale
A headache pain rated a 6 on a scale of 0 to 10 could indicate a post-dural puncture headache, which is common after spinal anesthesia. It requires attention but is not an immediate
life-threatening condition. .