Embryology First Week.pptx

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EMBRYOLOGY (FIRST WEEK)

FERTILISASI ■ Fertilisasi (pembuahan), proses penyatuan gamet priamdan wanita, terjadi di daerah ampula tube uterine ■ Hanya 1 % sperma yang mengendap di dalam vagina yang memasuki serviks, tempat sperma ini bertahan hidup selama berjam-jam. ■ Pergerakan sperma terjadi karena : a) kontraksi uterus dan uterine tube dan b) sperma itu sendiri ■ Spermatozoa tidak dapat memfertilisasi oosit segera sesudah kedatangannya di dalam saluran genitalia wanita namun menjalani (1) kapasitasi dan (2) reaksi akrosom

Fase fertilisasi meliputi: • Fase l, penetrasi korona radiata • Fase 2, penetrasi zona pelusida • Fase 3, penyatuan membran sel oosit dan sperma

1. Reaksi korteks dan zona. 2. Melanjutkan pembelahan meiosis kedua. 3. Pengaktifan metabolik sel telur.

Basil utama fertilisasi adalah sebagai berikut: •Restoration of diploid number of chromosome • Determination of the sex of the new individual •initiation of cleavage

CLEAVAGE

BLASTOCYST FORMATION

UTERUS AT THE TIME OF IMPLANTATION

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