![]() The head is also growing to accommodate the enlarging brain. It measures about 6 cm from head to buttocks. The various vital organs are formed as the body straightens.īy week 12, most of the major organ systems would have been developed and the baby, known as a foetus, takes on a more recognisable form. The baby can now be considered a foetus and this stage is a time of rapid growth. First Trimester: Week 6 - 12 Baby development It is crucial that you consult your doctor if you are taking any long-term medications. You may feel absolutely fine and the first clue to your pregnancy could be the fact that By the end of week 6, the embryo measures about 4 - 5 mm and the heart starts to beat and can be detected on a scan at the end of this stage. Major defects may be produced during this period should there be an exposure to these teratogens. This is a period whereby the developing organs are highly sensitive to teratogens (drugs affecting the development of baby). ![]() The inner layers of the fertilised egg (known as the inner cell mass) will give rise to the brain, lungs, central nervous and intestinal systems The outer layers of the fertilised egg (known as the outer cell mass) will form the eventual placenta The various structures of your baby are not yet fully developed. It arises just after fertilisation of the egg and subsequent implantation of the embryo into the womb lining. This is still considered the embryonic stage. First Trimester: Week 1 - 6 Baby development However, this is just a guide and each pregnancy could be different. The symptoms that you may experience are different. These periods are important as varying stages of fetal development are present in each of the trimesters. Third trimester - Week 29–40 of pregnancy.Second trimester - Week 13–28 of pregnancy. First trimester - Week 1–12 of pregnancy.Your pregnancy can be generally divided into three main phases: Eur J Vasc Endovasc Surg 2011 41 Suppl 1:S1.After conception and throughout the course of your pregnancy, your baby goes through various phases of growth and development as it implants into the womb and matures into a full term foetus. Management Of Abdominal Aortic Aneurysms Clinical Practice Guidelines Of The European Society For Vascular Surgery. Moll FL, Powell JT, Fraedrich G, et al.2010 ACCF/AHA/AATS/ACR/ASA/SCA/SCAI/SIR/STS/SVM Guidelines For The Diagnosis And Management Of Patients With Thoracic Aortic Disease: a Report of the American College of Cardiology Foundation/American Heart Association Task Force on Practice Guidelines, American Association for Thoracic Surgery, American College of Radiology, American Stroke Association, Society of Cardiovascular Anesthesiologists, Society for Cardiovascular Angiography and Interventions, Society of Interventional Radiology, Society of Thoracic Surgeons, and Society for Vascular Medicine. ![]() Hiratzka LF, Bakris GL, Beckman JA, et al.What are the symptoms of aortic dissection? What are the Symptoms of an Aortic Emergency? What are the symptoms of an abdominal aortic aneurysm? Society of Interventional Radiology: Abdominal Aortic Aneurysm Diagnosis and Treatment Options.
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