Correct Answer: D

Rationale: The correct answer is D because placenta praevia can lead to life-threatening bleeding during labor due to the placenta partially or completely covering the cervix. This condition poses a high risk of morbidity and mortality to both the mother and the baby. A: Incorrect. Bleeding in placenta praevia is not related to the segment preparing for labor. B: Incorrect. While bleeding is due to placental issues, it is specifically due to the placenta's abnormal positioning, not a pathological process. C: Incorrect. Bleeding can occur before 37 weeks in cases of placenta praevia, and the timing of bleeding is not linked to gestational age.

Correct Answer: D

Rationale: 1. Emotional counseling helps women cope with grief. 2. Explaining causes provides closure and understanding. 3. Supporting future pregnancies ensures better outcomes. 4. All options address different aspects of support needed after stillbirth. 5. Therefore, providing emotional counseling, explaining causes, and supporting future pregnancies collectively offer comprehensive care.

Correct Answer: C

Rationale: The presenting diameter in brow presentation is the suboccipitofrontal diameter. This is because in brow presentation, the fetal head is in a deflexed position, with the largest diameter being from the subocciput (back of the head) to the frontal bone (forehead). This allows the head to enter the pelvis in the transverse diameter. A: Mentovertical - This refers to the chin to the top of the head, not the correct diameter for brow presentation. B: Submentobregmatic - This refers to the chin to the bregma, not the correct diameter for brow presentation. D: Occipitalfrontal - This refers to the back of the head to the forehead, not the correct diameter for brow presentation.

Correct Answer: A

Rationale: Step-by-step rationale: 1. Cognitive ability is important for decision-making during surgery. 2. Functional status helps assess the patient's ability to recover post-surgery. 3. Competency assessment ensures the patient can consent to surgery. 4. Frailty score predicts surgical outcomes in geriatric patients. 5. Cognitive ability is not typically assessed preoperatively in the ACS/NSQIP guidelines. Summary: - A: Cognitive ability is not typically part of preoperative evaluation. - B: Functional status is important for post-surgery recovery. - C: Competency assessment is crucial for informed consent. - D: Frailty score helps predict surgical outcomes in geriatric patients.

Correct Answer: D

Rationale: Step 1: Atony of the uterus is the most common cause of primary postpartum hemorrhage due to inadequate uterine contractions. Step 2: Trauma of the genital tract can lead to bleeding but is not as common as atony of the uterus in postpartum hemorrhage. Step 3: Blood coagulation disorder can contribute to excessive bleeding but is not the primary cause of postpartum hemorrhage. Step 4: Prolonged 3rd stage can result in postpartum hemorrhage but is typically secondary to uterine atony.