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Fizjologia i diagnostyka wczesnej ciąży u klaczy - Vetkompleksowo – serwis dla lekarzy weterynarii
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Wyszukaj w serwisie


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Fizjologia i diagnostyka wczesnej ciąży u klaczy


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Ciąża u klaczy trwa około 330-345 dni. Pierwsze 40 dni ciąży to okres zarodkowy, po którym następuje okres płodowy.

Okres zarodkowy u koni trwa do czasu, aż zarodek osiągnie szczyt pęcherzyka zarodkowego, woreczek żółtkowy ulegnie redukcji oraz rozpocznie się formowanie sznura pępowinowego (13). Okres zarodkowy u klaczy można podzielić na kilka etapów:

  1. Zejście zarodka w 5-6. dniu od zapłodnienia z jajowodu do macicy.
  2. Okres wewnątrzmacicznej migracji kulistego pęcherzyka zarodkowego, podczas której woreczek żółtkowy odgrywa dominującą rolę w odżywianiu zarodka.
  3. Fiksacja pęcherzyka zarodkowego 16. dnia od zapłodnienia.
  4. Orientacja pęcherzyka zarodkowego – usytuowanie bieguna pęcherzyka zawierającego zarodek u dołu.
  5. Powstawanie kubków endometrialnych oraz dodatkowych ciałek żółtych po upływie pięciu tygodni od zapłodnienia (13).

Wczesna ciąża u klaczy charakteryzuje się kilkoma unikalnymi cechami, różniącymi konie od innych gatunków ssaków. Należą do nich: wydłużony okres przebywania pęcherzyka zarodkowego w jajowodzie (11), pasaż jedynie żywych embrionów z jajowodu do macicy (31), przemieszczanie się kulistego pęcherzyka zarodkowego wewnątrz światła macicy (12), otoczonego kapsułą glikoproteinową (20), bardzo późna implantacja (2) i tworzenie się kubków endometrialnych, wytwarzających końską gonadotropinę kosmówkową (eCG) (32).

Wczesny okres zarodkowy

Wczesny rozwój embrionalny przebiega w jajowodzie. [...]

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Mogą zainteresować Cię również


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Wizytówka firmy


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Sklep


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