Stages of Pregnancy

  • Week 1

    Week 1
    Fertilization takes place, This is the time when the baby is concieved.
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    First Trimester

  • Week 2

    Week 2
    The egg is now in the nutrient rich lining of the uterus and the cells are rapidly multiplying.
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    Pregnancy Time Span

  • Week 4

    Week 4
    Right now the baby is the size of a poppy seed. The two layers in the picture will form the baby's organs and body parts. The bubble is the developing yoke sak.
  • Week 5

    Week 5
    The circulatory system will start to develop and the baby's heart will start to beat.
  • Week 6

    Week 6
    You can tell where the baby's nose, mouth and ears will take shape and the intestines and lungs are beginning to develop.
  • Week 7

    Week 7
    The baby has doubled the size it was in week 6 and the hands and feet are starting to develop.
  • Week 8

    Week 8
    The baby has now begun moving but the mother will not feel it until much later. Nerve cells are branching out throughout the body.
  • Week 9

    Week 9
    The baby's physiology is in place but even though the baby weighs a fraction of an ounce, he/she is about to start gaining a lot of weight.
  • Week 10

    Week 10
    The skin is still translucent but the nails on the baby's fingers are starting to develop.
  • Week 11

    Week 11
    The baby is almost fully formed. She/he is able to move and stretch and even hiccup as the baby's diaphram develops.
  • Week 12

    Week 12
    This week the baby's reflexes kick in. Their fingers will soon open and close, toes will curl, and the baby's mouth will make sucking movements.
  • Week 13

    Week 13
    The baby now has their very own fingerprints. The veins and organs are clearly visible through the skin. If it's a girl, she now has 2 million eggs in her ovaries.
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    Second Trimester

  • Week 14

    Week 14
    The baby's brain impulses have begun to fire, and the baby is now using their facial muscles. The kidneys are up and running, and if you get an ultrasound, you may see them sucking their thumb.
  • Week 15

    Week 15
    The baby's eyelids are still fused shut, but the baby can sense light. The baby is the size of an apple.
  • Week 16

    Week 16
    Legs are becoming more developed and the pattern on the baby's scalp has begun. The baby's head is much more upright.
  • Week 17

    Week 17
    The baby can now move their joints and the skeleton is hardening to bone.
  • Week 18

    Week 18
    The baby can now flex their arms and legs, and it can be felt by the mother.
  • Week 19

    Week 19
    The baby's senses are developing and the baby can now hear you talk.
  • Week 20

    Week 20
    The baby can swollow now and their digestive system is producing what will be the baby's first poop.
  • Week 21

    Week 21
    The baby will now start to kick at the amniotic sac walls.
  • Week 22

    Week 22
    Features such as lips and eyebrows are more distinct. The baby's eyes will soon open.
  • Week 23

    Week 23
    The baby is great at hearing and the baby recongnizes certain voices.
  • Week 24

    Week 24
    The baby has a long and lean figure but that will change in the upcomming weeks.
  • Week 25

    Week 25
    The baby's wrinkled skin is starting to fill out with baby fat and the hair is comming in nicely.
  • Week 26

    Week 26
    The baby is now inhaling and exhaling amniotic fluid to prepare the lungs for breathing air at birth.
  • Week 27

    Week 27
    The baby now sleeps and wakes on a regular schedual and the lungs are fully formed.
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    Third Trimester

  • Week 28

    Week 28
    The baby's eyelashes have grown and the baby's eyes are developing and can sense light from outside the mothers tummy.
  • Week 29

    Week 29
    The head is growing to make room for the developing brain and the muscles and lungs are preparing for birth.
  • Week 30

    Week 30
    The amount of amniotic fluid is now a pint and a half, although there will be less when the baby continues to grow.
  • Week 31

    Week 31
    The baby can now turn his/her head and a layer of fat is accumulating under the skin.
  • Week 32

    Week 32
    Both the mother and baby are gaining weight quickly.
  • Week 33

    Week 33
    The bones in the baby's skull are not fused yet because of how the baby will have to leave the womb. They will not be fused until adulthood.
  • Week 34

    Week 34
    The baby's centeral nervous system is maturing as are the lungs.
  • Week 35

    Week 35
    The baby's kidneys are fully developed and the liver can process some waste products.
  • Week 36

    Week 36
    The waxy substance that protects the baby's skin throughout pregnancy is fading away as the baby prepares for birth.
  • Week 37

    Week 37
    The lungs and brain are fully maturing as the baby looks more and more like a newborn.
  • Week 38

    Week 38
    The baby's eye color is developing.
  • Week 39

    Week 39
    The baby is regulating their body teperature for the outside world.
  • Week 40

    Week 40
    Preparing for birth.
  • Week 41

    Week 41
    The baby has now passed the due date which means more than likely the mother will have to be induced.