Development of the Fetus

• What is the term used for a developing human from conception to about 8 weeks?

  Embryo
• What is the approximate size of an embryo from head to bottom?

  8 mm
• In what does the embryo float?

  A sac of fluid
• What can be seen on an ultrasound scan of the embryo?

  Tiny heart beats
• What basic structures are present in the embryo?

  Simple brain and spine
• What is the term used for a developing human from about 8 weeks to birth?

  Fetus
• What is the approximate size of a fetus from head to bottom at week 14?

  85 mm
• What major developments occur in the fetus by week 14?

  All organs, muscles, limbs, and bones in basic form
• What can be heard on an ultrasound scan of the fetus at week 14?

  Strong heartbeat
• What physical change occurs in the uterus by week 14?

  It grows to support the developing baby
• What happens to the fetus by week 20?

  The mother begins to feel the baby move
• What is the approximate weight of the fetus at week 20?

  350 g
• What is lanugo?

  Very fine hair covering the fetus
• What does it mean for a fetus to be viable from week 24?

  It can survive outside the uterus with medical support
• What developments occur in the fetus by week 28?

  Limbs and organs are almost fully developed
• What can the fetus do by week 28?

  Open eyes and may see light
• How much has the weight of the fetus increased by week 28?

  It has trebled
• What does the fetus do with amniotic fluid by week 28?

  Swallows small amounts and passes urine
• What position does the fetus usually move into by weeks 37-40?

  Fetal position, head-down
• What happens to the fetus during the remaining time in the uterus before birth?

  It puts on weight and forms fat under the skin
• What are the features of the fetus at week 14?

  • 6 cm in length
  • Can move limbs
  • Facial features developed
  • Fingers and toes separate, nails grow
• What are the features of the fetus at week 28?

  • 36-38 cm in length, weighs over 1 kg
  • Hair on head is now visible
  • Fingernails appear
  • Milk teeth developed under gums
• Describe the development of the fetus in the uterus at week 14

  •weighs 55g and is the size of a mouselemon

  •6 cm in length

  •can swim and make a fist.

  •nerves and muscles developing rapidly/ Spine developed

  •facial features developed/eyelids covered.