Pregnancy week by week

First trimester

Week 1-2 – conception takes place.

Week 3 – the baby is a tiny ball called blastocyst, made up of cells that are multiplying quickly.

Week 4 – development of the placenta.

Week 5 – signs like sore breasts and fatigue start to develop.

Week 6 – the baby’s mouth, nose, and ears start to develop. Morning sickness may set in.

Week 7-  hands and feet form.

Week 8 – the baby can constantly move though you can’t feel it.

Week 9 – the baby is almost an inch long now and much more human-like.

Week 10 – structures and organs are in place now ready to grow.

Week 11- tiny tooth buds are forming, and the hands can open and close into fists.

Week 12 – the brain is growing rapidly, and the kidneys can now excrete urine.

Week 13 – the baby is now almost 3 inches long.

Second trimester

Week 14 – less nausea 

Week 15 – the baby can now sense light. Taste buds are developing.

Week 16 – from now on the baby starts to grow more.

Week 17 – the baby’s skeleton is now changing from soft cartilage to bone.

Week 18 – the baby’s genitals are now visible on the ultrasound.

Week 19 – the baby can hear you sing!

Week 20 – the baby can swallow and produce meconium.

Week 21- 25 – more growth and movement.

Week 26 – the baby can inhale and exhale amniotic fluid in small amounts which is a good breathing practice.

Week 27 – the baby can open and close the eyes and suck the fingers.

Third trimester

Week 28 – more development of the eyes.

Week 29 – more development of the brain, lungs, and muscles.

Week 30-33 – more growth and movement.

Week 34 – lungs and the central nervous system are maturing.

Week 35- 38 – less movement due to the size, more maturity of organs. For the mother, there are occasional contractions and more vaginal discharge.

Week 39-41- the baby is full term now, and labour pains may set in any time. 

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