Fetus Development

By reginar_g
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    Week 1 & 2

    The Uterus lining is thickening
    The girl is ovulation and around this time the she get pregnant
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    First Trimester

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    Zygote

    The sperm enters the egg
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    Morula

    Day 2-3
    A solid ball of cells. It leaves oviduct and enters uterus
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    Blastocyst

    A hollow ball of cells
    This is implanted to the endometrium
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    Embryo

    day 12-week 12
    The baby is now called an embryo
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    Week 3

    All characteristics have been decided
    Beginning development of the brain, spinal cord, heart, and gastrointestinal tract.
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    Week 4&5

    The embryo attaches to the uterus, the amniotic and yolk sac are forming. You can now the embryo with ultrasound
    The embryo now has tube forming that will become other body parts
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    Week 6

    The embryo now has eyes and organs are now forming: the lungs, jaw, nose, and palate begin now.
  • Embryo during week 7

    Embryo during week 7

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    Week 7

    Limb now are forming, umbilical cord is fully operational
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    Week 8

    Fetus now has a face and it’s starting to straighten out
  • Embryo during week 9

    Embryo during week 9

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    Week 9-13

    There are now 2 legs. Reproductive organs are now forming
    Tail is gone and finger webbing is gone
    The eyelids close
    The head is nearly half the size of the entire fetus
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    Fetus

    Week 12 and on
  • Fetus during week 12

    Fetus during week 12

  • Fetus during week 14-16

    Fetus during week 14-16

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    Week 14-16

    The fetus’s skin is transparent and a fine hair called lanugo begins to form on the head. The fetus begins sucking and swallows bits of amniotic fluid. Fingerprints developed on the fingers of the fetus. The fetus has reached 6 inches in length and weighs about 4 ounces.
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    Second Trimester

  • Fetus during week 17-20

    Fetus during week 17-20

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    Week 17-20

    The baby has reached a point where movements are being felt more often by the mom.
    The eyebrows and eyelashes grow in
    The fetus has reached a length of 8 inches and weighs about 12 ounces.
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    Week 21-23

    All the components of the eyes are developed
    Baby's hair becomes visible
    Fat begins to develop
  • Fetus during week 24-26

    Fetus during week 24-26

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    Week 24-26

    Baby responds to your voice
    The air sacs in the lungs have begun formation
    The nervous system has developed enough to control some functions
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    Third Trimester

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    Week 27-32

    At the end of the 7th month the baby is a lot heavier, about 2-4 pound, and measures about 36 cm. The baby's hearing is fully developed , also the bay is now responding to pain sound and light.
  • Fetus during week 28

    Fetus during week 28

  • Fetus during week 32

    Fetus during week 32

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    Week 33-36

    The baby now measures about 46 cm long, and weighs as much as 5 pounds, the baby will continue to develop and accumulate fat. by this time the baby is kicking more and becoming more active. At this time the babys brain is developing quickly because it can now hear and see. And most of the internal systems are well developed except for the lungs that might be immature.
  • Fetus during week 36

    Fetus during week 36

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    Week 37-40

    By the end of the pregnancy the baby is still growing and developing. The lungs are nearly develope. The baby's reflexes are now better developed allowing him to blink, turn the head and grasp firmly. Also during this time the baby changes position to get itself ready for labour, it goes down into the pelvis and usually its head is facing down towards the birth canal. By the end of the 9th month the baby measures from 46-51 cm, and weighs about 7 pounds.