Michaela Irwin (2); Fetal Development Timeline

Timeline created by skritzman@western.k12.in.us
  • Last Period / Ovulation

    Last Period / Ovulation
    Last Menstrual Cycle began on January 1, 2020. The menstrual cycle is the monthly hormonal cycle a female’s body goes through to prepare for pregnancy. During this time, ovulation occurs. Ovulation refers to a time during the menstrual cycle when an ovary releases an egg or ovum. Ovulation occurs around 14 or 15 days from the first day of the woman's last menstrual cycle. https://www.womenshealth.gov/menstrual-cycle/your-menstrual-cycle
  • Conception

    The conception date is January 10, 2020. During this time the mother is in her fertile window which is the best chance of conception. Conception occurs when a sperm cell combines with an egg cell to form a zygote. The male's sperm cell fertilizes the women's ovum.
  • 1-8 Week of Pregnancy

    1-8 Week of Pregnancy
    First Trimester
    -Weight: 0/.035 (lb/oz)
    -Height: 1.5 (in)
    -Placenta begins to form.
    -The brain and spinal cord begin to form.
    -The tissues that will form the heart begin to beat. The heartbeat -can be detected with ultrasound at about 6 weeks of pregnancy.
    -Buds for limbs appear with paddle-like hands and feet.
    -The eyes, ears, and nose begin to develop. Eyelids form, but remain closed.
    -The genitals begin to develop.
  • 9-12 Week of Pregnancy

    9-12 Week of Pregnancy
    First Trimester
    -Weight: 0/.175 (lb/oz)
    -Height: 2.4 (in)
    Buds for future teeth appear.
    Fingers and toes start to form. Soft nails begin to form.
    Bones and muscles begin to grow.
    The intestines begin to form.
    The backbone is soft and can flex.
    The skin is thin and transparent.
    The hands are more developed than the feet.
    The arms are longer than the legs.
  • 13-20 Week of Pregnancy

    13-20 Week of Pregnancy
    First-Second Trimester
    Weight 11.5 (oz)
    Height: 9.75 (in)
    -Arms and legs move.
    -External sex organs are formed.
    -The outer ear begins to develop.
    -The fetus can swallow and hear.
    -The neck is formed.
    -Produce urine.
    -The skin is wrinkled.
    -The fetus is more active.
    -The fetus sleeps and wakes regularly.
    -Nails grow.
    -In female fetuses, the eggs have formed in the ovaries. In male fetuses, the testes have begun to descend.
    -It may be possible to tell the sex of the fetus on an ultrasound exam.
  • 21-28 Weeks of Pregnancy

    21-28 Weeks of Pregnancy
    Second Trimester
    Weight: 2/4 (lb/oz)
    Height: 13.65 (in)
    -The brain is rapidly developing.
    -Tear ducts are developing.
    -Finger and toe prints can be seen.
    -The lungs are fully formed but not yet ready to function outside of the uterus.
    -The eyes can open and close and sense changes in light.
    -The fetus kicks and stretches.
    -The fetus can make grasping motions and responds to sound.
    -Lung cells begin to make a substance that will enable breathing.
  • 29-32 Weeks of Pregnancy

    29-32 Weeks of Pregnancy
    3rd Trimester
    Weight: 3/13 (lbs/oz)
    Height: 15.6 (in)
    -With its major development finished, the fetus gains weight very quickly.
    -Bones harden, but the skull remains soft and flexible for delivery.
    -The different regions of the brain continue to form.
    -Hair on the head starts to grow.
    -Lanugo begins to disappear.
  • 33-36 Week of Pregnancy

    33-36 Week of Pregnancy
    3rd Trimester
    Weight: 5/5 (lb/oz)
    Height: 17.5 (in)
    -The fetus usually turns into a head-down position for birth.
    -The brain continues to develop.
    -The skin is less wrinkled.
    -The lungs are maturing and getting ready to function outside of the uterus.
    -Sleeping patterns develop.
  • 37-40 Week of Pregnancy

    37-40 Week of Pregnancy
    3rd Trimester
    Weight: 7/0 (lb/oz)
    Height: 19.5 (in)
    -The fetus drops lower into the pelvis.
    -More fat accumulates, especially around the elbows, knees, and shoulders.
    -The fetus gains about half a pound per week during this last month of pregnancy.
  • Due Date / Birthday

    Due Date / Birthday
    The due date of the baby is October 10th, 2020. The average newborn is 19.5 inches long and weighs 7.25 pounds. The limbs and major organs should be fully formed, the skull is still soft at this time so there may be some abnormalities on the baby's head. There also may be some discoloring of the skin, but it’s nothing to worry about. The third trimester is over when the baby is born. https://www.parents.com/toddlers-preschoolers/development/physical/age-by-age-growth-chart-for-children/