1. During a normal delivery, which fetal presentation is most common? A) Cephalic B) Breech C) Shoulder D) Compound Answer: A) Cephalic Rationale: The cephalic presentation, where the baby's head comes first, is the most common and preferred for delivery as it usually presents the least complications for both mother and child. 2. What is the primary hormone responsible for the maintenance of pregnancy? A) Estrogen B) Progesterone C) Human chorionic gonadotropin (hCG) D) Oxytocin Answer: B) Progesterone Rationale: Progesterone plays a crucial role in maintaining the uterine lining for pregnancy, and its levels remain high throughout gestation. 3. Which placental layer directly provides nutrients and oxygen to the fetus? A) Decidua basalis B) Chorionic villi C) Amnion D) Yolk sac Answer: B) Chorionic villi Rationale: The chorionic villi are finger-like projections that extend into the maternal blood supply, allowing for the exchange of nutrients and oxygen between mother and fetus. 4. What is the term for the period immediately following childbirth? A) Antepartum B) Intrapartum C) Postpartum D) Preterm Answer: C) Postpartum