Updated 08 October 2018

Week 5: 35 weeks to go!

The embryo develops into three layers and you might start noticing some changes to your body.

Well done, your baby is now officially an embryo.

Your baby's progress:

  • Your little one is about the size of an apple seed.
  • The embryonic period lasts for about six weeks and is a time of rapid growth and development.
  • The embryo is protected by the amniotic sac and nourished by the placenta. The umbilical cord connects the placenta with the embryo. (The mother and embryo don't share the same blood system.)

The embryo develops into three layers:

  • The ectoderm (top layer) – from which will develop the nervous system, the skin and other organs.
  • Mesoderm (middle layer) – from which will develop the bones, muscles, kidneys, reproductive organs, heart and circulatory system (the latter system is the first organ system to function).
  • Endoderm (inner layer) – from which will develop the digestive system, lungs, thyroid, thymus and the beginnings of the urinary system.
Your baby's progress:
  • Your breasts may change. They may become swollen and tender to the touch. The skin around the nipple (areola) may darken.
  • Your appetite may increase or you could be affected by nausea and vomitting.
  • You may crave certain foods or develop a sudden dislike for foods that you previously enjoyed.
  • You will probably find that you have to run to the bathroom to urinate more often.

What to do: 

  • Dads-to-be often feels excluded during pregnancy. Make every effort to get them involved.
  • Keep a list of your upcoming check-ups at hand. 
  • Start getting excited! 

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