Fetal Development

  • Week one:

    Week one:
    This was the last mestrual cycle for Becky. The first day of her period was considered the start of her 40 weeks of pregnancy. A full term pregnancy is considered to be 40 weeks anything before 37 weeks is considered preterm.
  • Ovulation Day

    Ovulation Day
    This is the day where Becky will ovulate meaning, that her LH levels will rise and cause her to release an egg into the fallopian tubes in order to be fertilized.
  • Conception Date

    Conception Date
    This is the day the baby was most likely conceived. Since the last menstrual cycle was on April 1st, 2016. She was most likely ovulating the 14th of April.
  • Week two:

    Week two:
    Becky's baby begins to form from a single fertilized egg to a cell that has divided itself. Every sperm carries a half-set of genetic information. Thirty hours later the developing embryo is still developing. The cell starts to travel towards the uterus where it will become implanted.
  • Week three:

    Week three:
    The males sperm is responsible for the sex of your baby, it is already predetermined. The cell starts to divide itself into 2 cells, then 4, 8 and on and on. Forty-six chromosomes will combine. 80 hours after ovulation the egg (fertilized) travels to the uterus, in order to embed itself within the lining of the uterus.
  • Week four:

    Week four:
    At this point the fertilized egg is now called a blastocyst. The developing embryo is only one-hundredth of an inch long. Implantation will be the place where the placenta attaches to the uterine wall. After it is implanted, the hormone hCG will start to release into Becky's blood stream.
  • Week five:

    Week five:
    The amniotic fluid is being built up. The embryo grows to 2mm, then by the end of the week will double it size to 4mm or bigger. The egg has grown into the mucous membrane of the uterus and starts to receives oxygen. The placenta also start growing.
  • Week six:

    Week six:
    The embryo has reached a size of about 8mm. The brain begins to divide into 5 parts. The spinal cord closes up and blood vesels are forming. Becky will feel sluggish and tired, possibly even get headaches from the rise in hormone levels.
  • Week seven:

    Week seven:
    The embryo is around 13 mm. The arms and legs start to grow. The lungs, liver, pancreas and hyroid gland are starting to be formed.
  • Week eight:

    Week eight:
    The embryo is measures about 18 mm. Elbows and toes become visible. The fetus starts to practice moving, although the mother won't be able to feel the movement until the 20th week. The baby's face starts to take shape, the mouth and nostrils start to form.
  • Week nine:

    Week nine:
    The embryo has grown to measure 30 mm. The eyelids are fully developed, they stay closed for several months though. Becky's baby is now swimming round in a little bag of fluid. The baby's head is much larger than its body.
  • Week ten:

    Week ten:
    The baby is now called a fetus. Testicles or ovaries start to form. The muscles are developing and the baby is starting to move. Fingerprints are already identifiable on the skin. Hair follicles begin to form.
  • Week eleven:

    Week eleven:
    The fetus is about 35 mm. The taste buds and tooth buds are starting to develop. The wrists and ankles have formed and the fingers and toes are clearly separated and visible. The baby is making over 250,000 nerve cells per minute.
  • Week twelve:

    Week twelve:
    The fetus is now about 6 cm. The baby can suck its thumb as well as get the hiccups. You can now hear the baby's heartbeat. Hair is now on the head and the fingers and toes have developed soft nails.
  • Week thirteen:

    Week thirteen:
    The fetus has grown to about 8 cm. Bone is beginning to replace cartilage. The baby can open and close its mouth. The baby also produces insulin. Becky's uterus has grown a lot.
  • Week fourteen:

    Week fourteen:
    The fetus is 3 1/2 inches. The eyes are moving toward the middle of the face, the nose is more defined and the kidneys start to produce urine. The baby's bones are getting much harder and stronger as the days go by.
  • Week fifteen:

    Week fifteen:
    Becky's baby is now over 4 inches. The baby can make a fist. The bone and marrow in the skeletal system are forming/ continuing to grow. You might start to feel the baby moving.
  • Week sixteen:

    Week sixteen:
    The fetus measures 5 inches. Fat begins to form within the baby. The baby can hear Becky's voice and now sleeps and dreams. The baby has learned to breathe. Fun fact: The baby can even do somersaults.
  • Week seventeen:

    Week seventeen:
    Baby is about 5 inches. Fetus weight is just over 5 ounces. The umbilical cord is growing. The baby's first stools form. The baby's eyes look forward now yet. the eyelids still remain shut.
  • Week eighteen:

    Week eighteen:
    The fetus is now 6 inches. Becky will be able to notice when her baby is awake and asleep. Alveoli begin to form in lungs and the vocal chords are fully developed.
  • Week nineteen:

    Week nineteen:
    Fetus is around 6 1/2 inches. The baby's private parts are clear and visible. Depending on the gender their parts will form along with the inner parts that go along with being a male or female.
  • Week twenty:

    Week twenty:
    The baby is now 7 inches. Becky will now start to feel her babys movements. Becky's baby will start to react to sounds and it will be able to recognize her voice.
  • Week twenty-one:

    Week twenty-one:
    Becky's baby is now starting to add on more fat and gain weight. The bone marrow within the bones has started to produce blood cells. If it's a girl she will start to produce eggs while within the womb while, boys don't start to produce sperm till puberty.
  • Week twenty-two:

    Week twenty-two:
    Becky's baby is 11 inches long and weighs about 1 pound. The sounds around the baby can be heard by it. Becky's movements are able to wake up the baby. Also it can taste now since the taste buds are developing.
  • Week twenty-three:

    Week twenty-three:
    The baby is over 11 inches now and still weighs about 1 pound. The eyebrows are visible, bones in the ear harden and it can successfully suck. The baby is constatnly moving around, rolling inside of the womb. Fun Fact: If born now Becky's baby would only have a 20% chance of survival.
  • Week twenty-four:

    Week twenty-four:
    Becky's baby is now gaining 3 ounces per week. It's about 12 inches long. The lungs are still developing. the baby's skin is being protected by a waxy substance. Pregnancy yoga will be good for Becky.
  • Week twenty-five:

    Week twenty-five:
    The baby is almost 14 inches and almost 2 pounds. Bones are becoming more solid, the brain is growing at a rapid pace, maturing as the days go on. Sexual organs have fully developed. The baby is now learning how to swallow.
  • Week twenty-six:

    Week twenty-six:
    The baby is now 14 inches long and weighs close to 2 pounds. The baby's feet are 2 inches and the hands are very active. The baby's eyes begin to open around this time. Muscle coordination is starting to develop, The fetal brain scan will show response to touch.
  • Week twenty-seven:

    Week twenty-seven:
    The fetus is almost 2 pounds and about 14 inches long. The baby's eyes can now open and blink. As the baby's hearing is still developing, Becky has been reading, singing and talking to her baby which is important.
  • Week twenty-eight:

    Week twenty-eight:
    Becky's baby is almost 2 1/2 pounds and is about 15 inches longs. Brain waves show rapid eye movement which could mean that her baby is dreaming.
  • Week twenty-nine:

    Week twenty-nine:
    The baby is still approaching the weight of 2 1/2 pounds.The brain is developing billions of neurons. The baby's muscles and lungs are continuing to mature.The fetus can respond to pain. The baby's head is growing bigger to accommodate the brain.
  • Week thirty:

    Week thirty:
    The baby is 16 inches long and weighs about 3 pounds. The wrinkled skin is becoming smoother now. Fun fact: The baby controls its own body temperature.
  • Week thirty-one:

    Week thirty-one:
    Becky's baby is about 3 1/3 pounds and almost 17 inches long. The baby's eyes can now respond to light and darkness. The baby's lungs and digestive tract are close to being mature. Now that for the most part all the organs are developed, the rest of the time spent in the womb will be focused on maturing these organs.
  • Week thirty-two:

    Week thirty-two:
    The baby is 17 inches long and weighs 4 pounds. The baby sleeps more often now so Becky may notice a decrease i movement. The womb is getting a little crammed for the fetus.
  • Week thirty-three:

    Week thirty-three:
    The baby is about 4 1/2 pounds and 17 1/2 inches long. Becky's baby drinks about a pint of amniotic fluid a day. Becky nwill start gaining around a pound a week. Calcium intake at this point of pregnancy is crucial.
  • Week thirty-four:

    Week thirty-four:
    Becky's baby now is 18 inches long and weighs about 5 1/2 pounds. If born now, the baby has a great chance at surviving. The fat gained helps fatten the arms and legs.
  • Week thirty-five:

    Week thirty-five:
    Your baby is about 18 1/2 inches long and weighs over 5 1/2 pounds. The baby's reflexes are coordinated. The lungs are almost fully developed. Fun fact: 90% of babies born this week survive.
  • Week thirty-six:

    Week thirty-six:
    The baby is about 19 inches long and weighs around 6 pounds. Becky may start to feel contractions. The baby will gain about a half of a pound per week. This is the week that Becky's baby might drop into the birthing canal.
  • Week thirty-seven:

    Week thirty-seven:
    The baby is 19 inches long and weighs about 7 pounds. Becky's water could break at any time now.
  • Week thirty-eight:

    Week thirty-eight:
    The baby is about 20 inches long and weighs around 7 1/2 pounds. Becky's baby should be in a birth position. At this point the baby's main job is to gain weight.
  • Week thirty-nine:

    Week thirty-nine:
    The baby is now 20 inches long and almost 8 pounds. Keeping an eye on your baby's activity level is important because, the space within the womb is very crammed. One more week to go!
  • Week fourty:

    Week fourty:
    Becky's baby is fully developed and ready for delivery. She has reached full term and her water should break and contractions should start at any moment.