How the Body Works : Implantation of the Ovum

Implantation of the Ovum

Within a few hours of fusion of the sperm and the ovum, cell division begins. The number of cells doubles with each successive division until a hollow ball of rapidly dividing cells is produced. Throughout the process the ovum is moving down the Fallopian tube toward the uterus. Five to six days after the fusion, the ovum reaches the uterus and implants itself in the soft wall. The hollow ball of cells now contains up to one hundred cells, arranged as an outer ring and an inner mass. The outer ring grows outward and penetrates the uterine tissue, while the inner mass divides into two separate layers, an inner endoderm and an outer ectoderm. These two layers become separated form the outer ring and by nine days form two cavities with the hollow ball. The ectoderm later spreads around the periphery of the smaller cavity, forming a sac, the amnion, which will surround and protect the developing embryo. The endoderm similarly encloses the larger cavity to form a yolk sac, which will have a nutritive function.

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[desertedsoulx]

This guy has one of those voices that made me fall asleep during class watching these types of videos. But this was informative.

[AlanaM879]

thanks, very clear and easy to understand - good for a student :)

[tnguyen318]

What is the actual?

[goloka108]

I love that voice, so calming!

[gulfland]

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embryology - the proof that islam is the truth

[PhyloidealCreations]

@soyelreferi99, that was, indeed, what i ment to say. the bleeding occurs after the reaching of the embryo to the uterus...thanks for the attention! ; )

[soyelreferi99]

@PhyloidealCreations , i think you ment, after reaching the Uterus.

[trusharusa1]

One question:

Is it normal to have spotting in third to fifth week after conceiving,Is there any relation with implantation?

[PhyloidealCreations]

before, cause implantation occurs in endometer, the uteus inner wall. the bleeding is caused by the break of endometer cappilaries, caused by the implatantion of the embryo

[dynasue77]

How we all began. Most interesting. That the fertilised egg grows into a fully formed baby in nine months is also amazing. It's little wonder the uterus has to stretch so hugely to contain it.

[26dorene26]

So if you have implantation bleeding is that after it reaches your uterus or before?