A placenta previa in which the placental edge just reaches the internal os is more commonly known as:

Choice A reason: This is not a good intervention, as it may worsen the symptoms of faintness, dizziness, and agitation. Standing up can cause a sudden drop in blood pressure (orthostatic hypotension), which can reduce the blood flow to the brain and the fetus. This can cause lightheadedness, blurred vision, and loss of consciousness in the woman, as well as fetal distress or hypoxia.

Choice B reason: This is not a good intervention, as it may also worsen the symptoms of faintness, dizziness, and agitation. Lying supine can cause compression of the inferior vena cava (a large vein that returns blood to the heart) by the gravid uterus, which can reduce the cardiac output (the amount of blood pumped by the heart) and the blood pressure. This can cause nausea, sweating, and visual disturbances in the woman, as well as fetal distress or hypoxia.

Choice C reason: This is not a good intervention, as it may not improve the symptoms of faintness, dizziness, and agitation. Sitting down and holding the arm in a dependent position can lower the blood pressure in the arm, but not in the rest of the body. This can cause inaccurate readings of the blood pressure and delay the detection of hypotension or hypertension. This can also cause discomfort and pain in the arm due to impaired circulation.

Choice D reason: This is the best intervention, as it can relieve the symptoms of faintness, dizziness, and agitation by improving the blood flow to the brain and the fetus. Turning to the left side can reduce the pressure of the uterus on the inferior vena cava and increase the cardiac output and the blood pressure. This can also optimize the placental perfusion (the blood flow to the placenta) and the fetal oxygenation.

Choice A reason: Progesterone is the hormone that stimulates the development of the alveoli and lobules of the mammary glands during pregnancy. It prepares the breasts for lactation by increasing the number and size of the milk-producing cells.

Choice B reason: Testosterone is the main male sex hormone that is responsible for the development of male reproductive organs and secondary sex characteristics. It has no direct role in the maturation of mammary gland tissue.

Choice C reason: Prolactin is the hormone that initiates and maintains milk production after childbirth. It is secreted by the anterior pituitary gland in response to suckling or nipple stimulation. It does not affect the maturation of mammary gland tissue.

Choice D reason: Estrogen is the hormone that stimulates the growth of the duct system of the mammary glands during puberty and pregnancy. It also promotes the development of female reproductive organs and secondary sex characteristics. It does not affect the maturation of mammary gland tissue.