Sexing Leopard Geckos: A Guide to Determining Their Gender

Leopard geckos (Eublepharis macularius) are fascinating reptiles known for their distinctive appearance and gentle temperament. If you are a leopard gecko owner or an aspiring enthusiast, one aspect of their care that you may be curious about is determining their gender. Sexing leopard geckos is an important task for various reasons, including breeding, enclosure management, and understanding their individual needs. In this comprehensive guide, we will explore the methods and considerations involved in sexing leopard geckos, including understanding sexual dimorphism, age and size considerations, methods for sexing, professional assistance, and tips for accurate sexing. By the end of this article, you will feel confident in identifying the gender of your leopard gecko.

You may also want to read about the leopard gecko lifespan.

Introduction to Sexing Leopard Geckos

Determining the gender of a leopard gecko is essential for several reasons. It helps ensure proper enclosure management by preventing unwanted breeding, allows for selective breeding programs, and aids in understanding the specific needs and behaviors of male and female geckos. While sexing leopard geckos can be challenging, there are several reliable methods that can help you accurately determine their gender.

Sexing Leopard Geckos

Understanding Sexual Dimorphism

External Differences

Leopard geckos exhibit sexual dimorphism, which means there are physical differences between males and females. These differences can be observed in certain external characteristics such as size, coloration, and the presence of certain features.

Pore Examination

Another method for determining the gender of a leopard gecko is by examining the presence and location of pre-anal pores. These pores, found on the underside of the gecko’s thighs, are more prominent in males and can help differentiate between the two genders.

Age and Size Considerations

The age and size of a leopard gecko can also provide valuable clues when it comes to sexing. While it is easier to determine the gender of adult geckos, the sexual characteristics may not be as apparent in juveniles. As geckos mature, their gender-specific features become more pronounced. Make sure to provide them with calcium and vitamins for optimal health.

Methods for Sexing Leopard Geckos

There are several methods commonly used for sexing leopard geckos. It is important to remember that accuracy improves with experience and by using multiple methods together. Here are three common techniques:

Tail Width Method

The tail width method involves comparing the base of the tail to the rest of the gecko’s body. Male leopard geckos tend to have a wider base to their tail, while females have a narrower and more evenly proportioned tail.

Hemipenal Bulges Method

The hemipenal bulges method focuses on the presence of bulges near the base of the tail. Males have more prominent bulges due to the presence of hemipenes, while females lack these bulges.

Probing Method

The probing method is a more advanced technique that involves inserting a small probe into the vent of the gecko to determine the presence of hemipenes. This method should only be performed by experienced individuals or professionals to avoid injury.

Sexing a Leopard Gecko

Professional Assistance for Sexing

If you are unsure about sexing your leopard gecko or want a professional opinion, it is recommended to seek the assistance of a reptile veterinarian or an experienced reptile breeder. They have the expertise and knowledge to accurately determine the gender of your gecko.

Tips for Accurate Sexing

To ensure the most accurate results when sexing your leopard gecko, consider the following tips:

  1. Wait until your gecko reaches a suitable age and size for more apparent sexual characteristics.
  2. Familiarize yourself with the different methods and compare results from multiple techniques for better accuracy.
  3. Be gentle and patient when handling your gecko during the sexing process to minimize stress.
  4. Document your findings and compare them to known reference materials or seek expert advice for confirmation.

FAQs About Sexing Leopard Geckos

  1. Q: At what age can leopard geckos be reliably sexed? A: Sexing leopard geckos becomes more reliable as they reach sexual maturity, usually around 6 to 12 months of age.
  2. Q: Can leopard geckos change their gender? A: No, leopard geckos cannot change their gender. Once their sexual characteristics develop, they remain consistent.
  3. Q: Are there any specific visual cues to help determine the gender of leopard geckos? A: Yes, besides the methods mentioned earlier, males often have a V-shaped row of pre-anal pores, while females have a more U-shaped row.
  4. Q: Can I rely solely on one method for sexing my leopard gecko? A: It is generally recommended to use multiple methods together for more accurate results. This helps minimize the margin of error.
  5. Q: How important is it to know the gender of a leopard gecko? A: Knowing the gender of your leopard gecko is crucial for proper care, breeding management, and understanding their specific needs and behaviors.


Sexing leopard geckos is an important aspect of their care and management. By understanding sexual dimorphism, considering age and size, and utilizing reliable sexing methods, you can confidently determine the gender of your gecko. Remember to handle your gecko with care and seek professional assistance when in doubt. Knowing the gender of your leopard gecko contributes to their overall well-being and allows for tailored care and a deeper understanding of their individual needs.