Development of the fetus


Development of the fetus

The development stages of the unborn baby (fetus)

The foetus at 4th of week of pregnancy:


  • Implantation occurs during the 4th week of pregnancy.
  • Mom-to -be will experience a missed period at this time.
  • Implantation can cause a spot of bleeding.
  • Your baby is smaller than a grain of rice.


8 Week old fetus

8 week fetus

  • The baby’s facial features begins to develop.
  • Each ear begins as a little fold of skin at the side of the head.
  • Tiny buds that eventually grow into arms and legs are forming.
  • So are fingers and toes.
  • Mom-to-be may feel moody and nauseous.
  • Heartbeat of baby is picked up with ultrasound.

9 week old fetus

9 week fetus

  • Your waistline may start to thicken, although others can’t notice your pregnancy yet.
  • The baby is the size of a peanut.
  • It does move, but you can’t feel the movement.


10 week old fetus

10 week fetus

  • Your baby is still small.
  • It’s limbs are longer and it can bend it’s elbows and knees.
  • Mom-to-be feels moody and tired.
  • Your uterus is the size of a grapefruit.


12 week old fetus

12 week fetus

  • The baby is growing larger now for the rest of the pregnancy.
  • Teeth and toenails develop.
  • Mom-to-be might develop stretch marks from here on.
  • Don’t fret about it – the scars will lighten with time after the pregnancy.
  • No creams you put on will help diminish or prevent stretch marks.
  • Stretch marks development has to do with your skin natural elasticity.

14 week old fetus

14 week

  • Your baby has now got unique facial features as well as finger prints.
  • If you poke your stomach it will try and wriggle away, because it starts responding to outside stimuli.
  • Mom-to -be may experience constipation, because pregnancy hormone relaxes the bowls.
  • Eat enough fiber,  drink plenty of water and get exercise to prevent constipation.

20 week old fetus


  • Your baby can hear sounds now.
  • It around  moves a lot – turning, twisting, punching and kicking.
  • Your waistline has disappeared.
  • There is a higher risk of bladder infections because the smooth muscles in the bladder tend to relax.
  • Fine soft hair starts to grow on your baby’s head and body.

28 Week old fetus


  • Your baby weighs about 1 kilogram now.
  • Brainwaves show rapid eye movement – he maybe dreaming.
  • His lungs is developing.
  • Mom-to-be may experience cramping of muscles, more frequent urination, mild swelling of ankles or legs, shortness of breath and Braxton-hicks contractions.
  • That is small painless contractions that is like a rehearsal  for birth.

36 Week old fetus


  • The baby will move head down to your lower abdomen.
  • The brain of the baby has been developing rapidly – he practices blinking constantly.
  • The baby weighs about 2.5 kilograms at this time.
  • Your are in the final month of pregnancy and needs to see your doctor every week.

40 Week old fetus


  • The lungs are nearly fully developed.
  • Your baby’s reflexes are coordinated so he or she can blink, close the eyes, turn the head, grasp firmly, and respond to sounds, light, and touch.
  • Mom-to-be will feel very uncomfortable – but try and rest as much as you can.
  • If you go into labour – don’t eat anything.

Get help

Signs of labour are:

Medizinischer Notfall

a ”Show” – that is the release of a mucus plug that has blocked the entrance to the uterus during the pregnancy. It looks like a small amount of sticky, jelly-like pink mucus.

Contractions that are rhythmic and painful and that lasts longer than 30 seconds.

”Water breaks” –  that is the release of the water in the amniotic sac that protected the baby.

If you experience any bleeding during this time, it would be a medical emergency.

MOBIEG Helpline

If you have more questions on pregnancy, you may chat to an online facilitator on the MOBIEG LIVE CHAT.

The service is free and you may stay anonymous.

We are online Sundays: 18h00-20h00 / Mondays – Thursdays 19h00-21h00



In case of a medical emergency:

Emergencies – 10111

Ambulance – 10177

Difficulty with emergency services – 1022

Police – 1011

Medical rescue – 0800-111-990

ER24 – 084 124


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