1. Developmental Differences: During fetal development, the testicles initially form within the abdominal cavity. As the fetus grows, one testicle descends into the scrotum through an inguinal canal, while the other usually follows later. Sometimes, one testicle may descend more rapidly or get temporarily caught in the inguinal canal, leading to a difference in their positioning.
2. Cremasteric Muscle: The cremaster muscle is a small muscle located in the scrotum. Its primary function is to regulate the temperature of the testicles by raising and lowering them. When the temperature is low, the cremaster muscle contracts, pulling the testicles closer to the body for warmth. In some cases, the cremaster muscle may be stronger on one side, causing one testicle to hang lower.
3. Anatomical Variations: Individual anatomical variations can also contribute to the difference in testicle positioning. The length of the spermatic cord, which connects the testicles to the abdomen, may vary between individuals. A longer spermatic cord on one side can allow that testicle to hang lower.
4. Hormonal Factors: Testosterone, the primary male sex hormone, plays a role in regulating the descent of the testicles. In some cases, hormonal imbalances or variations can affect the descent process, leading to one testicle being lower than the other.
5. Inguinal Hernia: In some individuals, a condition called an inguinal hernia may cause one testicle to appear lower. An inguinal hernia occurs when a portion of the intestine or abdominal tissue protrudes through a weakness in the abdominal wall near the inguinal canal. This can push one testicle downward, creating a noticeable difference in positioning.
It's important to note that having one testicle lower than the other is usually a normal variation and does not typically cause any health problems or affect fertility. However, if you have concerns or notice a significant change in the position or size of your testicles, it's always advisable to consult a healthcare provider for evaluation.