| Material | serum 1 ml |
| Method | LCMS |
| Species list | horse, donkey |
| Duration | 5 days |
| Remark | - Mare: To determine an intact pregnancy
- In pregnant mares, oestrone sulphate is secreted in increasing concentrations from the 50th day onwards. The oestrone sulphate level drops to basal level after abortion or resorption within a few days. Reliable diagnosis is possible from day 110 onwards.
- Stallion (from 3 years of age): Diagnosis of cryptorchidism (horse only; please indicate sex on submission form). Because of the higher sensitivity and as it is independent of age, we recommend the determination of Anti-Müllerian Hormone (AMH) instead.
- Llama/alpaca: diagnosis of late pregnancy (from 10/11th month onwards).
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