A 30 year old female developed diffuse hair loss 3 months after delivery of her first child. The probable diagnosis is
**Core Concept**
Diffuse hair loss in a postpartum woman is often related to hormonal changes, particularly the decrease in estrogen levels after childbirth. This condition is a form of telogen effluvium, a non-scarring alopecia characterized by an increased number of hairs in the telogen phase.
**Why the Correct Answer is Right**
The decrease in estrogen levels postpartum disrupts the normal hair growth cycle, leading to an increased number of hairs entering the telogen phase. This results in diffuse hair loss, which is often noticeable 2-3 months after delivery. The hairs that are lost are usually telogen hairs, which are easily plucked out. This condition is self-limiting and resolves on its own within 6-9 months.
**Why Each Wrong Option is Incorrect**
**Option A:** Alopecia areata is an autoimmune condition characterized by patchy hair loss, not diffuse hair loss. It is not related to hormonal changes postpartum.
**Option B:** Androgenetic alopecia is a common cause of hair loss in women, but it is not directly related to the postpartum period. It is characterized by a pattern of hair loss, often with a widening of the central parting.
**Option C:** Trichotillomania is a psychiatric condition characterized by compulsive hair pulling, which is not related to the postpartum period or hormonal changes.
**Clinical Pearl / High-Yield Fact**
Postpartum hair loss is a common condition that affects up to 50% of women within 3-6 months after delivery. It is usually self-limiting and resolves on its own within 6-9 months.
**Correct Answer: D. Telogen effluvium.**