In a case of undescended testis, After what age fuher descent doesnot occur ?
**Core Concept**
Undescended testis, also known as cryptorchidism, is a condition where one or both testes fail to descend into the scrotum during fetal development or early childhood. The timing of testicular descent is influenced by hormonal and anatomical factors, particularly the presence of androgens and the development of the gubernaculum.
**Why the Correct Answer is Right**
After 1 year of age, further descent of the testis does not occur in most cases. This is because the process of testicular descent is largely complete by 9 months of gestation, and any delay or failure of descent is usually evident by this time. The presence of androgens, such as testosterone, plays a crucial role in the descent of the testis, and their levels are typically sufficient to facilitate descent in most cases by 1 year of age. Any delay in descent beyond this point may indicate an underlying issue.
**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect because the timing of testicular descent is not typically influenced by the child's diet or nutrition.
**Option B:** This option is incorrect because while hormonal influences play a role in testicular descent, the presence of androgens alone is not sufficient to facilitate descent in all cases.
**Option C:** This option is incorrect because the process of testicular descent is not typically completed by 6 months of age.
**Clinical Pearl / High-Yield Fact**
It is essential to note that undescended testis is associated with an increased risk of testicular cancer, infertility, and other complications. Early diagnosis and treatment, such as orchiopexy, can help mitigate these risks.
**Correct Answer:** B. 1 year of age.