Embryos Development

Timeline created by huntermckinney
  • Fertilization (week 1)

    Fertilization  (week 1)
    the process of fertilizing an egg, female animal, or plant, involving the fusion of male and female gametes to form a zygote.
  • Cells join, divide & new life begins (week 2)

    Cells join, divide & new life begins (week 2)
    This is ovulation. If in the next 36 to 48 hours just one of the 350 million sperm in the average ejaculate can get all the way from the vagina through the uterus and into the fallopian tube to penetrate the egg, the egg will become fertilized. Sperm can live for up to 5 days in this environment, therefore making pregnancy possible for up to 5 days after intercourse.
  • Implantation (week 3)

     Implantation (week 3)
    The fertilized egg immediately begins dividing and floats down into the uterus. Immediately upon fertilization your little one is set as a boy or a girl.
  • The embryonic stage begins (week 4)

    The embryonic stage begins (week 4)
    The cells making up the ovum are beginning to differentiate and specialize in areas of development. Some cells will make up the embryo; others the amniotic sac and placenta etc. The ovum, which has been floating around in your uterus, has now implanted into the wall of the uterus. Now comes an exciting time of rapid growth!
  • The heart begins to beat (week 5)

    The heart begins to beat (week 5)
    At this time the embryo is still smaller than the size of a raisin. Low on the sides of the head are two folds of tissue that will become the ears. Although not completely developed, all the major body organs and systems are formed. The heart also forms, and it begins to beat on the 25th day after conception (about 6 weeks after the last menstrual period), and a heart beat can already be detected.
  • Arms and legs begin to grow (week 6)

    Arms and legs begin to grow (week 6)
    The embryo's arms and legs begin to grow from buds at each side. At first the hands and feet are shaped like paddles, but the fingers soon take shape. Lenses of the eyes appear - You would notice your baby's appearance is becoming increasing like a newborn's. Brain is growing well.
  • Starts to practice moving (week 7)

     Starts to practice moving (week 7)
    The arms and legs continue to develop - These limbs are stretching out more and more. Later on you will be feeling those feet and elbows up close and personal right in your bladder. The embryonic tail has almost disappeared.
    The pituitary gland is also forming and the embryo is beginning to grow muscle fibers. The heart has divided into the right and left chambers and is beating about 150 beats a minute which is about twice the rate of an adult.
    The baby's facial features are visible, includ
  • Fingers and Toes form (week 8)

     Fingers and Toes form (week 8)
    During this week of pregnancy your baby is now swimming round in a little bag of fluid. The arms and legs have lengthened. They fingers and toes are forming, but are still joined by webs of skin. They can flex their elbows and wrists. They are growing eyelids as well as forming their anus. The embryo is protected by the amniotic sac that is filled with fluid. Inside the embryo swims and moves gracefully. The embryo is now about 1 inch long.
  • Embryo is now a Fetus (week 9)

    Embryo is now a Fetus (week 9)
    The unborn baby is now called a fetus. Though the fetus is constantly moving, you will not be able to actually feel fetal movement for several more weeks. All of the organs, muscles, and nerves are in place and beginning to function. As the hands and feet develop fingers and toes, they have lost their paddle like look. The touch pads on the fingers form and already have fingerprints.
  • Neurons multiply (week 10)

    Neurons multiply (week 10)
    The eyelids have fused shut and will not open again until around week 27. The wrists and ankles have formed and the fingers and toes are clearly visible. Genitals have begun to form, but it is too early to tell the sex of the fetus. By this week of the pregnancy the placenta has developed enough to support most of the critical job of producing hormones.
  • (week 11)

    (week 11)
    The hair is on the head and the fingers and toes have developed soft nails. The kidneys are developed and begin to secrete urine.
  • Baby flexes and kicks (week 12)

    Baby flexes and kicks (week 12)
    Your baby is now producing insulin the hormone that controls their blood glucose. The fetus is now 3 inches long and weighs about an ounce. The baby's unique fingerprints are already in place. The muscles lengthen and become organized. You can't feel it yet, but your baby can move in a jerky fashion, flexing the arms and kicking the legs.