Gebelik ve Doğum

Gebeliğin Oluşumu

25 Nisan 2020

Sağlıklı bir spermin sağlıklı bir yumurtayı tüpte döllemesi ile oluşan insan vücudunun en büyük hücresi zigotun defalarca bölünerek oluşturduğu blastokistin rahim içine yerleşmesi ile gebelik süreci başlar. Yerleşimden yaklaşık 8 gün sonra kanda gebelik hormonu tespit edilebilebilir. 

İlk sekiz haftada oluşan yapıya embriyo, sekiz haftadan sonra da fetus denir. Ortalama ilk sekiz haftada tüm organların oluştuğu organagenes tamamlanmış olur. 

Bu mükemmel mucize, gebelik nasıl oluşur?

Sağlıklı bir spermin sağlıklı bir yumurtayı tüpte döllemesi ile oluşan insan vücudunun en büyük hücresi zigotun defalarca bölünerek oluşturduğu blastokistin rahim içine yerleşmesi ile gebelik süreci başlar. Yerleşimden yaklaşık 8 gün sonra kanda gebelik hormonu tespit edilebilebilir. 

İlk sekiz haftada oluşan yapıya embriyo, sekiz haftadan sonra da fetus denir. Ortalama ilk sekiz haftada tüm organların oluştuğu organagenes tamamlanmış olur. Sonrasında hafta hafta bebeğimiz büyümeye başlar

12. Hafta

  • Baş,pop uzunluğu 6-7 cm arasındadır.
  • Kemikleşme merkezleri oluşmaya başlar. 
  • El, ayak parmakları farklılaşmış haldedir. 
  • Cilt ve tırnaklar oluşmuştur. 
  • Dış genital yapı, dişi veya erkek cinsiyet işaretlerini açıkça göstermeye başlar.
  • Rahim elle hissedilir hale gelmiştir.

16.Hafta

  • Baş-popo uzunluğu 12cm kadardır, ağırlık yaklaşık 110 gr kadardır.
  • Bu dönemde cinsiyet tamamen belirlenebilir.

20.Hafta

  • Son adet tarihine göre hesaplanan gebeliğin tam orta noktasıdır.
  • Fetus 300 gramdan fazla ve ağırlık her geçen gün doğrusal oranda artmaktadır.
  • Fetal cilt yavaş yavaş saydamlığını kaybeder
  • Rahim göbek deliği çevresinde elle hissedilebilir halde büyümüştür.
  • Bebek hareketleri aktif olarak hissedilir.

24. Hafta

  • Fetus yaklaşık 600-650 gram kadardır.
  • Akciğer gelişimi belirli bir evreye kadar tamamen tamamlanmıştır
  • Cilt altı yavaş yavaş yağ depolamaya başlar. 

28.Hafta

  • Baş-pop uzunluğu yaklalış 25 cm kadardır
  • Bebeğimizin ağırlığı 1000-1200 gram arasıdır.
  • Bu haftadan sonra %90 olasılıkla bir bebeğin fiziksel ve nörolojik bozukluğu olmadan sağlıklı olarak hayatta kalma şansı vardır.

32.Hafta

  • Fetusun baş pop mesafesi yajlasık 28 cm ağırlığı da 1800 grama ulaşmıştır.
  • Cildi kırmızımsı ve buruşuktur.
  • Bu haftadan sonra NST (bebeğimizin yeterli düzeyde oksijen alıp almadığını, otonom sinir sisteminin gelişip gelişmediğinin tespit edildiği bebek kalp atışlarının dinlendiği bir testtir.) çekilebilir.

36.Hafta

  • Bebeğimiz yaklaşık 2500 gram ağırlığındadır.
  • Cilt yağ dokusu depolanması nedeniyle gövde ve yüz daha dolgun görünür.

40.Hafta

Son adet döneminden sonra 40 hafta bebeğimizin tahmini doğum haftasıdır. 

Related Posts

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5 Mart 2020

Doğum Süreci

23 Nisan 2020

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