Related Experiment Videos
[Demonstration and evolution of chorionic gonadotropin in ewes]
Comptes Rendus Des Seances De L'Academie Des Sciences. Serie D, Sciences Naturelles
|February 26, 1979
Summary
Ovine Chorionic Gonadotropin (oCG) is detected in pregnant ewes as early as day 15. This hormone, found in placenta and amniotic fluid, may maintain high progesterone levels during late pregnancy.
Area of Science:
- Reproductive endocrinology
- Pregnancy physiology
- Hormone detection
Context:
- The study investigates the presence and role of ovine Chorionic Gonadotropin (oCG) in sheep pregnancy.
- Previous research has not fully elucidated the temporal dynamics and significance of oCG during gestation.
Purpose:
- To demonstrate the occurrence of oCG in pregnant ewes using a radioreceptor assay.
- To determine the earliest detection time and secretion pattern of oCG during pregnancy.
- To explore the potential role of oCG in maintaining high progesterone levels in late gestation.
Summary:
- Ovine Chorionic Gonadotropin (oCG) was identified in the placenta and amniotic fluid of ewes via radioreceptor assay.
- oCG can be detected as early as the 15th day of pregnancy.
- The hormone is secreted at a constant rate, with peak concentration around day 130, potentially contributing to elevated progesterone levels in the final 100 days of gestation.
Impact:
- Provides crucial insights into the hormonal regulation of sheep pregnancy.
- Establishes a method for early pregnancy detection in ewes using oCG.
- Contributes to understanding the physiological mechanisms underlying prolonged high progesterone levels in ovine gestation.