The commonest major cause of primary postpartum haemorrhage is

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.

Correct Answer: B

Rationale: The correct answer is B: FALSE. In mild preeclampsia, the mother may have symptoms such as mild hypertension, proteinuria, and sometimes mild edema. This indicates that the mother does have complaints, albeit they may be mild. The other choices (A, C, D) are incorrect because in mild preeclampsia, the mother does have complaints, so option A is not true. Options C and D are not applicable as they do not provide any information.

Correct Answer: A

Rationale: The presenting diameter in brow presentation is Submentobregmatic (choice A) because it refers to the distance from the submentum (chin) to the bregma (anterior fontanelle). This is the appropriate measurement for the brow presentation as the brow is the prominent part between the forehead and the chin. Choice B (Suboccipitofrontal) is incorrect because it refers to the distance from the subocciput to the frontal bone, which is not relevant to brow presentation. Choice C (Occipitalfrontal) is incorrect because it describes the distance from the occiput to the frontal bone, which again is not specific to brow presentation. Choice D (Mentovertical) is incorrect as it denotes the distance from the chin to the vertex, which is not the relevant measurement for brow presentation.

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: B

Rationale: The correct answer is B: FALSE. In mild preeclampsia, the mother may have symptoms such as mild hypertension, proteinuria, and swelling. This contradicts the statement that the mother has no complaints. Choice A is incorrect because it inaccurately states that the mother has no complaints. Choices C and D are not applicable as they do not provide any relevant information to address the question.