The first dose of the immunization for Measles, mumps, and rubella (MMR) is given at the age of

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Choice A rationale:

Afterbirth hemorrhage, or postpartum hemorrhage (PPH), is a significant concern after childbirth. One of the common causes is retained placental fragments. When placental tissue is not completely expelled after delivery, it can lead to continuous bleeding. This condition requires prompt medical intervention, often through uterine exploration and removal of the retained tissue.

Choice B rationale:

Unrepaired vaginal lacerations can cause bleeding, but they are usually identified and repaired immediately after delivery. In this case, the woman gave birth 4 hours ago, so unrepaired lacerations would have been addressed during the delivery process.

Choice C rationale:

Uterine atony, which is the lack of normal uterine muscle tone, can cause postpartum hemorrhage. However, in this scenario, the woman was given Pitocin, which is an oxytocic medication used to prevent or treat uterine atony by inducing uterine contractions. Therefore, uterine atony is less likely to be the cause in this case.

Choice D rationale:

Puerperal infection, also known as postpartum infection, can cause fever, uterine tenderness, and foul-smelling discharge. While it can lead to complications, it is not the most likely cause of significant bleeding in this situation.

Choice A rationale:
Bronchoscopy is not the essential test for diagnosing cystic fibrosis. Bronchoscopy is a procedure that allows the healthcare provider to visualize the airways and lungs but is not the primary test for cystic fibrosis diagnosis. Cystic fibrosis is primarily diagnosed through genetic testing and sweat chloride testing.
Choice B rationale:
Serum calcium levels are not specific to cystic fibrosis diagnosis. Serum calcium levels are typically used to assess calcium balance in the body and are not directly related to cystic fibrosis diagnosis.
Choice C rationale:
Urine creatinine levels are not specific to cystic fibrosis diagnosis. Urine creatinine levels are often used to assess kidney function and muscle breakdown but are not diagnostic for cystic fibrosis.
Choice D rationale:
Sweat chloride test is essential in establishing the diagnosis of cystic fibrosis. Cystic fibrosis is characterized by the abnormal transport of chloride across cell membranes, leading to salty sweat. The sweat chloride test measures the amount of chloride in the sweat and is a key diagnostic test for cystic fibrosis. Values above a certain threshold (typically 60 mmol/L) are suggestive of cystic fibrosis.