Managing Ovarian Cysts in Bitches and Queens: Choosing the Right Treatment Approach

Ovarian cysts can present a treatment dilemma, particularly when they occur in breeding bitches or queens. The decision is not simply whether a cyst is present, but whether the animal can safely retain ovarian function and reproductive potential. Cyst type, hormonal activity, uterine health and the animal’s breeding status all influence the management approach. 

When Is Surgical Treatment Appropriate? 

Ovariohysterectomy remains the most commonly used treatment for ovarian cysts¹. Removal of the ovaries, or removal of the ovaries together with the uterus, eliminates the affected ovarian tissue and therefore removes the source of the cyst. 

This approach can be particularly appropriate for non-breeding females and animals with concurrent uterine pathology. Prolonged exposure to ovarian steroid hormones can contribute to reproductive complications. Follicular cysts, for example, may produce sustained estradiol and have been associated with persistent estrus, prolonged proestrus, hyperestrogenism, cystic endometrial hyperplasia-pyometra complex, and bone marrow suppression^1,2. 

When significant uterine disease is already present, preserving ovarian function may therefore not be the most appropriate objective. 

What About Fertility-Preserving Treatment? 

The situation is different in a valuable breeding animal. Removing the ovaries eliminates future reproductive potential². Medical management may therefore be considered when fertility preservation is important and the animal is otherwise suitable for conservative treatment. 

Gonadotropin-releasing hormone (GnRH) analogues and human chorionic gonadotropin (hCG) have been associated with approximately 63% success in some reported settings². This suggests that hormonal intervention may provide an option in selected cases, but the outcome cannot be assumed to be the same for every cyst or patient. 

Recurrence is an important consideration with conservative management. The underlying hormonal activity also needs to be considered because luteinized follicular cysts, luteal cysts, and cystic corpus luteum may be associated with progesterone hypersecretion, mammary gland hyperplasia, and pregnancy-like behavioural changes². 

Assess the Uterus Before Choosing Conservative Management 

Before attempting hormonal treatment, evaluation should extend beyond the ovary. Pre-existing uterine disease needs to be excluded, particularly because hormonally active ovarian cysts can be associated with uterine pathology^2,3. 

Estrogen-associated hematological changes should also be considered before conservative treatment is attempted^2,3. This pre-treatment assessment is particularly important when the goal is to preserve fertility rather than proceed directly to definitive surgery. 

Treatment Decisions in Breeding Animals² 

For a breeding bitch or queen, treatment should be individualized rather than based solely on the presence of an ovarian cyst. The clinician needs to consider whether the cyst is hormonally active, whether the uterus remains suitable for reproduction and whether the potential benefits of preserving ovarian function outweigh the possibility of recurrence or ongoing reproductive complications. 

The limited information available on non-surgical management also means that treatment outcomes cannot yet be predicted reliably across different cyst types. This reinforces the importance of careful patient selection and follow-up when a fertility-preserving approach is chosen. 

Key Takeaways 

• Ovariohysterectomy remains the most commonly used treatment for ovarian cysts.

• Surgical management is particularly relevant in non-breeding females or animals with concurrent uterine pathology.

• GnRH analogues and hCG have shown approximately 63% success in some reported settings.

• Conservative treatment may be considered when fertility preservation is important, but recurrence remains a concern.

• Before hormonal treatment, clinicians should assess for uterine disease and estrogen-associated hematological changes.

• The treatment decision should be based on cyst characteristics, hormonal activity, uterine health and reproductive goals, rather than the ovarian lesion alone. 

References 

1. Knauf Y, Köhler K, Knauf S, Wehrend A. Histological classification of canine ovarian cyst types with reference to medical history. Journal of veterinary science. 2018 Nov;19(6):725-34. https://synapse.koreamed.org/upload/synapsedata/pdfdata/0118jvs/jvs-19-725.pdf 

2. Domrazek K, Kondratek K, Tobolewski F, Jurka P. Prevalence, diagnosis, and treatment of ovarian cysts in bitches and queens: a meta-analysis. Animals. 2025 Sep 25;15(19):2800. https://www.mdpi.com/2076-2615/15/19/2800 

3. Knauf Y, Bostedt H, Failing K, Knauf S, Wehrend A. Gross pathology and endocrinology of ovarian cysts in bitches. Reproduction in Domestic Animals. 2014 Jun;49(3):463-8. https://onlinelibrary.wiley.com/doi/pdfdirect/10.1111/rda.12311