ประมาณวันที่ 7 หลังจากการปฏิสนธิ เอ

Approximately 7 days after fertilization, the embryo produces bags and learn around the embryo, and there are some small twig is filed. There is inserted in the uterus prepared pour deux. Subsequently, the development of the placenta, so the placenta consists of a bag of balls and the tissue layers, there is a temple of the prepared parent's embryo was created for himself in sneaker bag bags containing liquid called water to moan. (Amniotic fluid) to prevent further and allow independent movement and the embryo was created for our cord with 3.

About 7 days after fertilization. Embryo to create a bag to surrounding tissues and some filing a twig. Endo is inserted in the atrium of the uterus. Which would later develop into the placenta. The first consists of the bag neck to the ball and tissue unglued an atrium of the parent embryo is created cysts themselves inside filled with liquid called amniotic fluid (amniotic fluid) to prevent damage and keeps the embryo. move freely It has been established that the umbilical cord.

Estimated date of 7 after fertilization. The embryo will create an enclosed bag Corea embryo and some filed as a small branch Inserted in the adhesive capsulitis of the uterus, which will later develop into hell.(amniotic fluid) to prevent damage and allows the embryo to move freely. And also creating a trust with the placenta, umbilical cord