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February 26, 2015 50 Comments

Embryogenesis is the process by which the embryo forms and develops. In mammals, the term refers chiefly to early stages of prenatal development, whereas the terms fetus and fetal development describe later stages.

Embryogenesis starts with the fertilization of the egg cell (ovum) by a sperm cell, (spermatozoon). Once fertilized, the ovum is referred to as a zygote, a single diploid cell. The zygote undergoes mitotic divisions with no significant growth (a process known as cleavage) and cellular differentiation, leading to development of a multicellular embryo.

Although embryogenesis occurs in both animal and plant development, this article addresses the common features among different animals, with some emphasis on the embryonic development of vertebrates and mammals.
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  1. ı ąɱ ą ʂῳɛɖɛ says:

    After watching this, i want a baby.

  2. Storm Mann says:

    If you’re ever feeling down, remember you’re the sperm that won

  3. Ryen Salwey says:

    lol i started laughing when the baby kicked the other one

  4. Sandra Pereira says:

    i’m on the weird yet interesting side of Youtube again :D

  5. Glo Girl says:

    3M? Out off all them niggas, ALL THEM NIGGAS, my ass won. 3M? Yo I deserve
    a standing ovation! Niggas trampled over me and shit but I still one.
    That’s what’s up

  6. Mandy Lessard says:

    I watched that whole thing and I am 9 years old

  7. Cupcakequeenlover says:

    My mom was going to have quad triplets I was one but my mother and my three
    sibling did not make it

  8. jasmine Lyons says:

    God we used to look like toads from aliens to looking like humans. Holy

  9. ~LuigiFan~ says:

    My mom was 40 when she gave birth to me and I’m not a twin… I’m an only

  10. Hidden Treasure says:

    How beautiful!

  11. aunt becky says:

    My grandmother was a twin and she gave birth to twins. What are the odds of

  12. Aya Does Things says:

    Oh! I had a vanishing twin… I didn’t know that’s what they were called.
    I’m an only child, my mother had a hard enough time with carrying me, so
    she never tried again. I suppose that’s why my twin did not survived.

  13. Pixel Nation says:

    is it bad that im 9 and my dick is only a little bigger than one of the

  14. Courtney zyla says:

    Really amazing..! 3 million view on your video that really interesting 

  15. Floofie Pony says:

    Annddd I’m 10 Years old watching “How babies grow in the thing!” How

  16. Princess3967 says:

    My mom had two miscarriages , one before me and after me. I was premature.
    My sister is fine. My mom has a pregnancy problem which, sadly, may get
    passed down to me and/or my sister. I hope it doesn’t happen to me, I would
    be devastated to go through a miscarriage or anything that may cause me to
    loose my future baby :'(

  17. Erica Curless says:

    This is so cool. I’m even more excited for my future to have kids 

  18. Long Island Breastfeeding says:

    This video mentions towards the end that in under developed countries,
    multiples are placed together for warmth and comfort. I hope that it is now
    common knowledge in underdeveloped AND developed countries, that multiples
    should always be placed together as a standard of practice. Skin to skin
    with mommy is ALWAYS best and works much more effectively than fake warmth
    from lights. When mommy isn’t available, Daddy, or twin sibling. 

  19. Mochi Chan says:

    Kudos to any mama who manage to grow a baby, crazy amount of work, you
    gotta grow a whole new set of brain, heart, bones, lungs, etc. I’m not even
    sure how moms survive more than 1 baby in the oven, all that weight,
    peeing, pooping, eating. lol

  20. Michael McKnight says:

    It’s 5am where I originally live.
    But on a plane……

    Lord how did I get onto this side of Youtube.

  21. pinkstarnik says:

    I Just found out yesterday that I’m carrying twins! We conceived on our
    first try even though I have a history of endometriosis and we had no help
    whatsoever. These twins are completely natural! I still can’t believe it!

  22. Elena Sunshine says:

    Im confused how can she have 3 twins

  23. Sheila Thao says:

    Holly xiong
    Cushy gif

  24. PiggyBrosGaming says:

    i was forced by my parents to watch this. :< 

  25. chloe morablanco says:

    That documentary was very interesting i never knew about the vanishing twin
    thing I know Identical twins who are 4 and it is cool thinking how tiny
    they were (both about 3lb) to how big they are now they are so fun to be
    around I remember one of them just sat staring at me whilst I was on my DS
    it was like he was watching me play

  26. BelledelaGroove says:

    My fiancé walks in and asks……..’ ……..why are you
    watching………this…honey’…..I just smiled : ) ……….his face

  27. iambackwithabang says:

    i am almost 19 weeks pregnant….i cant wait to hold my baby in my
    arms….i cried on seeing the delivery at the end of the video….such a
    beautiful miracle…

  28. doodelay says:

    it’s easy to identify yourself as the sperm that won the prize but we’re
    not just made of the DNA inside the sperm, we got the other half of our DNA
    from the women’s egg. So in actuality, we were essentially the sperm [and]
    the egg simultaneously :]

  29. Iftimie Catalin says:

    Not to cells and a miracle. The is no miracle in reproduction. We figured
    it out, you know…

  30. Travis Rabble says:

    Women should feel guilty about shitting out babies when there are so many
    orphans in the world, they think their spawn is superior to those orphans,
    they are disgraceful selfish nazis.

  31. Maria Cecilia Pacatang says:

    I am 38 weeks pregnant now 🙂 can’t wait to finally meet our little one. I
    cried towards the end of this video. Such a precious moment!

  32. Mels Joy says:

    So excited about having my own little child. I have been dreaming about the
    day I experience this with my love. ❤️

  33. Brazen Turtle says:

    dumb cows

  34. CoMaLi says:

    I find it kind of strange to have so many people present in delivery.
    Husband? Of course. Mother(in law) and sister? N E V E R !!! o.O 

  35. Majesstica Mitchell says:

    Im 13 Weeks and cant wait to see my baby.

  36. jhonboy says:

    if we thinks somtim of dis nature…SPEACHLESS….

  37. Mary Beatrice says:

    I cried ,so cute when this babies go out

  38. Noelle Waren says:

    Okay…I’ll admit it, I cried when the two babies were born lol! Everytime
    I watch a birth it makes me cry haha

  39. Kez P says:

    Wow! God’s creation is so amazing and complex
    It’s amazing how it all works

  40. thatgirlAmber says:

    Iv’e never had a kid nor will i for a very long time but I feel like giving
    birth is very very painful but I guess like when you finally have your baby
    in your arms you forget all about how bad it was and just how happy you

  41. Nagisa Furukawa says:

    Wonder how safe home births are.

  42. Nish Kanazawa says:

    The Doctor looks like Nicky Minaj. Just Saying.

  43. Brent and Irene Hope to Adopt says:

    We are hoping to grow our family through adoption. If you or someone you
    know is considering adoption, please contact us at 317-224-7864.

  44. Amy Jay says:

    just about 4 weeks,so excited all I’ve been watching is pregnancy

  45. Elizabeth Gonzalez says:

    Awe I cried when she had her baby!! How sweet! 

  46. Brittany Jones says:

    This is beautiful! I’m 5 months and now I’m really terrified to give birth

  47. lexiken says:

    wonderful video!

  48. RAGE XxMARTiANz says:

    I think I am pregnant i am 10 years old and I think i drank the milk mans
    sperm in the the milk, my mum said it was off but I didn’t believe her and
    I drank i

  49. sarah affi wayo says:

    Thanks be to God, He is wonderful.

  50. Volvo Twinturbo says:

    this is bullshit!

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