The Fetal Development

  • First Week

    First Week
    During a womans first week, a woman will have her last menstrual period, and the first day of bleeding is their considered the first day of pregnancy!
  • Second Week

    Second Week
    In your second week of pregnancy, you might not feel pregnant but your body is producing large amounts of pregnancy hormones, and your babies major organs are all beginning to form!
  • Third Week

    Third Week
    A single sperm has broken through the tough outer membrane of your egg and fertilized it. A few days later the fertilized egg arrives in the uterus and started burrowing into the lining.
  • Fourth Week

    Fourth Week
    During your fourth week of pregnancy, your baby will be the size of a poppy seed, and its cells are tunneling into the lining of your uterus, creating spaces for your blood to flow so that the developed placenta will be able to provide nutrients and oxygen to your growing baby when it starts to function at the end of this week.
  • Fifth Week

    Fifth Week
    Now that you are in your 5th week of pregnancy, your little baby is now the size of an orange seed! Your hCG hormone levels in your body are now increasing, and the organs are forming faster than ever.
  • Sixth week

    In week 6, your baby has tripled in size and has a regular heartbeat! Now when you have your next ultrasound, youll be able to view it, but its still very small, almost the size of a pulsing dot.
  • Seventh Week

    In week 7, your babies brain is growing, and becoming more complex. Fun Fact; Your babies grades are growing at 100,000 cells per minute!
  • Eighth Week

    In week 8, your babies features are becoming more noticable and precise! Youll now be able to see more than just a pulsed dot and by the end of this week your babies body will begin to form.
  • Nineth Week

    In week 9, your babies arms can finally bend at the elbows, the eyelids are fully formed, and the babies joints ar eworking and allowing the baby to move freely within your amniotic sac!
  • Tenth Week

    In week 10,this is the end of the embryonic period and beginning of the fetal period! This week, your baby's vital organs are functioning, but contine to mature.
  • Eleventh Week

    In week 11, you are getting closer to the end of your first trimester and your baby is becoming more active even though you may not be able to feel much movement!
  • Twelveth Week

    In week 12, your baby will begin to tske more recognizable appearance as the eyes move closer, ears move closer, and the intestines have grown so much they extend into the umbilical cord!
  • Thirteenth Week

    In week 13, your baby's tiny fingertips have fingerprints, their veins and organs are visible through the still-thin skin, and the babies body is starting to catch up with their head.
  • Fourteenth Week

    In week 14, your baby can now squint, frown, grimace, pee, and even such their thumb! The babies body is growing faster than their head, which now sits upon a more distinct neck. By the end of this week, the babies arms will have grown to a length that's in proportion to the rest of the body.
  • Fifteenth Week

    In week 15, your baby is busy moving amniotic fluid through their nose and upper respiratory tract, which helps the primitive air sacs in the lungs begin to develop!
  • Sixteenth Week

    In week 16, the baby will have a huge growth spurt. This week, and the next few weeks, your baby will double weight and add inches to the length! The patterning of the scalp has begun, and the baby even started growing toenails!
  • Seventeenth Week

    In week 17, your baby's skeleton is changing from soft cartilage to bone, and the umbilical cord is growing stronger and thicker.
  • Eighteenth Week

    In week 18, the babies blood vessels are visible through the thin skin, and their ears are now in their final position. A protective covering of myelin is beginning to form around the nerves which is a process that will continue for a year after the babies born!
  • Nineteenth Week

    In week 19, your baby's sensory development is now developing, and their brain is designating specialized areas for smell, taste, hearing, vision, and touch. Their arms and legs are also in the right proportions to each other and the rest of the body!
  • Week Twenty

    In week 20, the baby is now swallowing more, which is good practice for their digestive system and their also starting to produce meconium, a black, sticky by-product of digestion.
  • Week Twenty-One

    In week 21, your baby's eyebrows and lids are present now, and if you're having a girl, her vagina has begun to form as well.
  • Week Twenty-Two

    In week 22, your baby is starting to look like a mini newborn. Their lips, eyelids, and eyebrows are becoming more distinct, and their even developing tiny tooth buds beneath the gums. The babies eyes have formed, but the irises still lack pigment.
  • Week Twenty-Three

    In week 23, the babies blood vessels in the lungs are developing to prepare for breathing, and the sounds that your baby's increasingly keen ears pick up are preparing them for entry into the outside world.
  • Week Twenty-Four

    In week 24, the babies body is filling out proportionally and will soon start to plump up. Their brain is also growing quickly now, and the taste buds are continuing to develop. The babies lungs are developing "branches" of the respiratory "tree" as well as cells that produce surfactant, a substance that will help air sacs inflate once they hits the outside world. The babies skin is still thin and translucent, but that will start to change soon.
  • Week Twenty Five

    In week 25, the babies wrinkled skin will begin to smooth out and they'll start to look more and more like a newborn. The baby will also begin growing more hair.
  • Week Twenty Six

    In week 26, the babies nerves in their ears are better developed and more sensitive than before. They may now be able to hear both your voice and your partner's as you chat with each other. They're also inhaling and exhaling small amounts of amniotic fluid, which is essential for the development of the lungs.
  • Week Twenty-Seven

    In week 27, more brain tissue is developing, and your baby's brain is very active now. While their lungs are still immature, they would be capable of functioning.
  • Week Twenty-Eight

    In week 28, your baby can blink their eyes, which now sport lashes, and with eyesight developing, they may be able to see the light that filters in through your womb. They're also developing billions of neurons in their brain and adding more body fat in preparation for life in the outside world.
  • Week Twenty-Nine

    In week 29, the babies muscles and lungs are continuing to mature, and their head is growing bigger to make room for the developing brain.
  • Week Thirty

    In week 30, A pint and a half of amniotic fluid surrounds the baby, but that volume will shrink as they get bigger and take up more room in your uterus. Their eyesight continues to develop, though it's not very keen; and even after they're born, the baby will keep their eyes closed for a good part of the day.
  • Week Thirty-One

    In week 31, your baby can turn his head from side to side, and his arms, legs, and body are beginning to plump out as needed fat accumulates underneath his skin. He's probably moving a lot, too, so you may have trouble sleeping because your baby's kicks and somersaults keep you up.
  • Week Thirty Two

    In week 32, He now has toenails, fingernails, and real hair (or at least respectable peach fuzz). His skin is becoming soft and smooth as she plumps up in preparation for birth.
  • Week Thirty Three

    In week 33, the babies rapidly losing that wrinkled, alien look and the skeleton is hardening. The bones in their skull aren't fused together, which allows them to move and slightly overlap, thus making it easier for the baby to fit through the birth canal.
  • Week Thirty Four

    In week 34, the babies fat layers that will help regulate her body temperature once the baby is born, are filling her out, making her rounder. Her skin is also smoother than ever. Her central nervous system is maturing and her lungs are continuing to mature as well.
  • Week Thirty Five

    In week 35, the babies kidneys are fully developed now, and their liver can process some waste products. Most of the basic physical development is now complete.
  • Week Thirth Six

    The babies shedding most of the downy covering of hair that covered their body as well as the vernix caseosa, the waxy substance that covered and protected their skin.
  • Week Thirty Seven

    Spending the next two weeks in the womb allows your baby's brain and lungs to fully mature
  • Week Thirty Eight

    In week 38, your baby has a firm grasp, which you'll soon be able to test when you hold their hand for the first time! The babies organs have matured and are ready for life outside the womb.
  • Week Thirty Nine

    In week 39, the baby continues to build a layer of fat to help control their body temperature after birth, The outer layers of the skin are sloughing off as new skin forms underneath.
  • Week Forty

    Week 40, your newborn baby will probably look scrunched up for a while, with their arms and legs not fully extended. They may even appear bowlegged. Your baby will stretch out, little by little, and by the time he reaches 6 months, he'll be fully unfurled!