Stages of foetal development

the different stages of foetal development is dealt here.

1. STAGES OF FOETAL DEVELOPMENT Presented by, D.Irene 16PGZ001,

2. Amazing facts!! Amazing Fact:  At fertilization, every bit of genetic information necessary for the child's development is present. The "program" for everything is there : hair and eye color , skin tone, height - even likely giftedness as a pianist, vocalist or computer programmer. Amazing Fact:  It's a good thing this blazingly fast growth rate slows down after the second month, otherwise the baby's birth weight would exceed 10 tons! Amazing Fact:  What was that noise? At 15 weeks, loud sounds may actually cause baby to startle Fetus may have different sleep wake cycle. Chances are after baby is born, he or she will want to be active about this same time!

3. 1.Early embryo 2.implantation 3.Neurulation 4.Neural crest differentiation 5.Development of neural cranial nerves 6.Development of eyelid, olfactory nerves, diaphragm 7. Development of liver, ventricular system, and genitals in females 8.Development of axial skeleton, abdominal wall, stomach.

4. EMBRYONIC PEROID (WEEK1-WEEK8) WEEK 1.Fertilization and blastocyst formation 2.Implantation 3.Neurulation and neural crest. 4.Heart begins to pump. Diaphragm forms 5.pituitary. Heart septum Liver Eye lens Abdominal wall 6.Limb buds Muscle and bone tissue Smell and olfactory nerves 7.Pancreas, bile ducts, eyelids and genitals. 8. Body  - straightening of trunk, umbilical cord, intestines herniated at umbilicus

5. Fetal period (week9-week40) Weeks 9-12 Fingers and toes are developing Hands and arms have almost reached their relative length but the legs and feet are still developing Liver begins making red blood cells but by the end of 12 weeks the spleen takes over Bones and muscles are developing Intestines are developing. Weeks 13-16 Rapid growth Coordinated limb movements External genitalia has formed Kidneys are functioning and making urine Hair on scalp, eyebrows, and eyelashes Fetus can swallow amniotic fluid and can hear Baby’s heart establishes a normal rhythm

6. Weeks 17-20 The sucking reflex is developed and fetus may suck on their hand or finger Quickening or fetal movements can be felt by mom Fetus is covered by a thick, waxy substance called vernix -this protects its fragile skin Fetus is covered in lanugo or soft, downy hair that helps vernix stay on the skin Brown fat that will be used for heat production in the newborn period begins to form Fetus has regular sleep and wake cycles Ultrasound can help determine the sex of the baby Weeks 21-24 Brain is growing at a rapid pace Eyes are beginning to open Lungs sacs are formed but not mature enough to function properly Lung size increases rapidly

7. Weeks 25-28 Surfactant (a substance that assists with lung expansion and patency) is secreted Lanugo (the baby’s soft downy hair) is disappearing By the end of the 28th week, bone marrow takes over red blood cell production Weeks 29-32 Rapid weight gain with the development of subcutaneous (below the skin) fat With the exception of the skull, bones begin to harden Brain is still developing with the regions differentiating Fetus is able to hiccup

8. Weeks 33-36 Brain is still developing Lungs are still maturing and proliferating Skin is less wrinkly At 34 weeks, fetus can begin to coordinate suck, swallow, and breath patterns At 36 weeks, rapid increase in glycogen stores in the liver – glycogen is the main source of fuel for the baby’s developing brain Weeks 37-birth Brain and lungs are still developing Baby is gaining weight and accumulating more fat Fetus is lower in the pelvis in preparation for birth

9. Week of gestation Size and weight of the fetus Week -9 2.3cm long and weigh about 2g Week-34 45cm and 2.1kg  Week- 10 3.1cm weighs nearly 4g Week-35 46.2cm and 2.4kg Week- 11 4.1cm and 8g Week-36 47.4cm and 2.6kg Week- 12 5.4cm and weighs up to 14g Week- 37 48.6cm and 2.9kg Week-13 4cm weighs nearly 23g Week-38 49.8cm  and 3kg  Week 14 8.7cm and weighs around 43g Week-39 50.7cm  and 3.3kg Week-15 8.7cm and weighs around 43g Week-16 11.6cm and weighs about 100g   Week-17 13cm and weighs about 140g Week-18 14.2cm and weighs up to 190g Week-20 25.6cm and weighs about 300g   Week-21 26.7cm long and weighs 360g Week-22 27.8cm and weighs 430g Week-23 28.9cm and weighs 500g Week-24 30cm and weighs 600g Week-25 34.6cm and weighs 660g Week-26 35.6cm and weighs 760g Week-27 36.6cm   and weighs 875g Week -28 37.6cm and weighs 1kg Week-30 1.1kg and is about 38.6cm Week-31 41.1cm  and 1.5kg https://www.babycentre.co.uk/6-weeks-pregnant Week-32 42.4cm  and 1.7kg Week-33 43.7cm and  1.9kg

10. conclusion

11. References https://www.babycentre.co.uk/40-weeks-pregnant https://www.pretrm.com/fetal-development-by-week.html Merenstein , Gerard B., and Sandra L. Gardner. Neonatal Intensive Care. 6th ed. St. Louis: Mosby Elsevier, 2006. Print. https://medlineplus.gov/ency/article/002398.htmhttps://www.pretrm.com/fetal-development-by-week.html