A 23 year old female presents to the clinic with history of recurrent aboions. While investigating this patient for recurrent aboions all of the following tests are to be done EXCEPT:
**Core Concept**
Thrombophilias refer to disorders that increase the risk of blood clot formation, which can lead to recurrent miscarriages. Investigating thrombophilias is crucial in patients with recurrent miscarriages to identify underlying causes and guide management.
**Why the Correct Answer is Right**
Thrombophilias can be caused by genetic mutations, such as Factor V Leiden, prothrombin gene mutation, or antithrombin deficiency. These conditions increase the risk of blood clots forming in the placenta, leading to recurrent miscarriages. Testing for thrombophilias involves measuring the levels of various clotting factors and assessing the function of the anticoagulant system.
**Why Each Wrong Option is Incorrect**
**Option A:** **Thyroid function tests** are relevant in patients with recurrent miscarriages, as thyroid disorders can affect placental function and increase the risk of miscarriage. Therefore, thyroid function tests are an essential part of the investigation.
**Option B:** **Rubella antibody levels** are also important in patients with recurrent miscarriages, as congenital rubella syndrome can increase the risk of miscarriage. Testing for rubella antibody levels is crucial to identify patients who are at risk.
**Option C:** **Anti-thyroid peroxidase antibodies** are relevant in patients with recurrent miscarriages, as autoimmune thyroiditis can increase the risk of miscarriage. Testing for anti-thyroid peroxidase antibodies is essential to identify patients with autoimmune thyroiditis.
**Clinical Pearl / High-Yield Fact**
It's essential to remember that a comprehensive investigation for recurrent miscarriages should include tests for thrombophilias, thyroid function, rubella immunity, and autoimmune thyroiditis.
**Correct Answer:** D