| Week 1 | (1)Fertilisation
(2)Clevage after 30hrs of Fertilisation (3)Clevage forms blastocyst 4-5 days after fertilisation (4)Now more than 100 cells (5)Implantation after 6-9 days |
| Week 2 | Primary Germ Layers(Ectoderm,Endoderm,Mesoderm) develop |
| Week 3 | (1)First sign of Pregnancy(Women will not have periods)
(2)Beginning of Backbone (3)Neural tube develops,beginning of Brain and Spinal cord |
| Week 4 | (1)Heart,Blood vessels,blood and gut start forming
(2)Umbilical cord developing |
| Week 5 | (1)Brain developing
(2)'Limb buds' , small swellings beginning of arms and legs (3)Heart is large tubeand starts to beat, pumping blood.This can be seen on an ultra sound scan |
| Week 6 | Eyes and Ears start to form |
| Week 7 | (1)All major internal organs developing
(2)Face forming and eyes have some colour (3)Mouth and tongue develop (4)Beginning of hands and feet |
| By Week 12 | (1)Foetus fully formed with all organs,muscles,bones,toes and fingers
(2)Sex organs well developed (3)Foetus will move |
| By Week 20 | (1)Hair,eyebrows and eye lashes bein to grow
(2)Fingerprints develop (3)Fingernails and toe nails will be growing (4)Firm hand grip (5)Between 16 to 19 weeks baby will be felt moving for first time |
| Week 24 | (1)Eye lids open
(2)Legal Limit for abortion in most circumstances |
| By Week 26 | Has a good chance of survival if born in this time(Premature baby) |
| By week 28 | (1)Baby moving vigorously
(2)Responds to touch and loud noises (3)Swallowing amniotic fluid |
| By Week 30 | Usually lying head down ready for birth |
| 40 weeks
(9months+7days) or (9months -7days) |
Birth |