Growing Baby


















Time
Weight and Length
Events
1 day n/a
  • the sperm and ovum unite
    		•
    7-10 days n/a
  • the fertilized ovum attaches to the lining of the uterus
  • the placenta begins to form
    		•
    2 weeks n/a
  • your baby, called an embryo, is now a layered disc on the uterus wall
  • you will miss your menstrual period
    		•
    4 weeks 0.4g (0.01 oz.)
  • the tube for the future heart starts beating
    		•
    8 weeks 22-24mm (1 inch)
    1g (0.036 oz.)
  • your baby, called a fetus, now has all the organs that a full term baby will have
  • the heart is functioning
  • bones begin to form
    		•
    12 weeks 9cm (3.5 inches)
    16g (0.5 oz.)
  • tooth buds are present
  • fingernails and toenails are forming
  • immature kidneys secrete urine to the bladder
  • external genitalia are forming
  • the fetus can now move in the amniotic fluid, but you can’t feel it
  • your health care professional may be able to hear your baby’s heart beat with
    an electronic listening device
    		•
    16 weeks 16cm (6.5 inches)
    100g (4 oz.)
  • the face looks more human
  • the head has hair
  • the ears stand out
  • your baby can hear your voice
  • you may feel the baby move
    		•
    17 weeks n/a
  • the baby begins to store some of your anitbodies
  • this slowly increases until birth
    		•
    20 weeks 25cm (10 inches)
    300g (10 oz.)
  • eyebrows and eyelashes appear
  • a fine downy hair (lanugo) appears all over baby's body
  • baby's skin is thin, shiny, and covered with a creamy protective coating called vernix
  • oil glans appear
  • legs lengthen and move well
  • teeth develop enamel and dentine are forming
  • meconium (baby's first stool) begins to appear in the intestines
    • 24 weeks 30cm (12 inches)
    600g (1 1/3lb.)
  • sweat glands form
  • baby has a lean body with red wrinkled skin
  • early breathing movements begin
  • surfactant is formed in the lungs which help mature lungs at birth
    		•
    26 weeks n/a
  • baby's outline can be felt through your abdomen
  • the eyes may be open now
    		•
    28 weeks 35-37cm (14 inch)
    1100g (2lb. 5oz.)
  • baby's body is still lean, but the skin is less wrinkled and red
  • baby can now store iron, calcium, and other nutrients
  • your baby can hear and respond to sound
    		•
    32 weeks 40-42cm (16 inches)
    1800-2100g (4lb.-4lb. 7oz.)
  • tooth buds are present
  • fingernails and toenails are forming
  • immature kidneys secrete urine to the bladder
  • external genitalia are forming
  • the fetus can now move in the amniotic fluid, but you can’t feel it
  • your health care professional may be able to hear your baby’s heart beat with
    an electronic listening device
    		•
    36 weeks 45-47cm (18 inches)
    2200-2900g
    (4lb. 11oz.-6lb. 5oz.)
  • baby's body is rounded and usually plump
  • the downy hair on the baby's body begins to disappear
  • the skin is smooth, pink, and covered with a grayish-white cheese-like
    substance called vernix
  • baby continues to store antibodies and is able to resist some diseases
  • usually baby can be safely born at this stage
    		•
    40 weeks 45-55cm (18-22 inches)
    3200g + (7lb. +)
  • head hair is usually present
  • testicles of male babies are now in the scrotum
  • labia majora of female babies are developed

    • You baby is full term now!

    Fetal Development Video