The nurse is providing care to a pregnant person at 32 weeks’ gestation. The nurse expects to observe what change in the pregnant person’s spine?

Correct Answer: D

Rationale: The correct answer is D: lordosis. At 32 weeks' gestation, the pregnant person's center of gravity shifts forward, causing an increased lumbar lordosis to compensate. This change helps maintain balance and support the growing uterus. Sclerosis (choice A) refers to hardening of tissues, not a typical change in the spine during pregnancy. Scoliosis (choice B) is a lateral curvature of the spine, not typically related to pregnancy. Kyphosis (choice C) is an exaggerated outward curve in the upper spine, not a common change in pregnancy.

Correct Answer: A

Rationale: The correct answer is A because teratogens, substances that can harm the developing fetus, can have negative effects on the baby at any point during pregnancy, not just in the first trimester. The nurse's response should educate the pregnant person about the ongoing risks and the importance of avoiding harmful substances throughout pregnancy. Option B is incorrect because an ultrasound is not used to assess the risk of teratogens. Option C is incorrect as it provides incorrect information that the risk is past, which is not true. Option D is incorrect as it is judgmental and does not address the pregnant person's misconception about the risks throughout pregnancy.

Correct Answer: B

Rationale: The correct answer is B because infants born at 25 weeks' gestation have a poor survival rate due to insufficient numbers of fetal lung alveoli. This leads to respiratory distress and difficulty in oxygen exchange, impacting their chances of survival. Choice A is incorrect as cardiac development is not the primary factor affecting survival. Choice C is incorrect as gastrointestinal development does not directly impact survival at this stage. Choice D is incorrect as the sucking reflex is not a critical factor in survival compared to respiratory function.

Correct Answer: C

Rationale: The correct answer is C: neonatal intensive care. This is because during a home birth, neonatal intensive care is not provided as it requires specialized medical equipment and expertise typically only available in hospitals. Labor support (A) and trained birth attendant (B) are essential for home births. Breastfeeding assistance (D) may be provided post-birth but is not a defining feature of care during a home birth.

Correct Answer: A

Rationale: The correct answer is A: The zona reaction. After fertilization, the zona pellucida undergoes a biochemical change called the zona reaction, which makes the ovum impenetrable to any other sperm. This process prevents polyspermy and ensures that only one sperm can fertilize the egg. Gametogenesis refers to the production of gametes, not the post-fertilization event. The zona pellucida is the glycoprotein layer around the ovum, and cleavage is the rapid mitotic cell division that follows fertilization, but neither of these directly relate to the ovum becoming impenetrable to other sperm.