This is not medical advice. Please consult a physician about any of your pregnancy questions and concerns. Every week of pregnancy brings new and interesting changes in your body and your child's development. In this article, we'll outline the key developments and changes that occur during each week of pregnancy, from conception to delivery. Weeks 1-4: Conception and Implantation Week 1 marks the beginning of pregnancy, starting from the first day of the woman's last menstrual period. Despite not being pregnant yet, this week is crucial for calculating the due date. By week 2, ovulation occurs, and conception may take place if sperm fertilizes the egg. The fertilized egg, known as a zygote, undergoes rapid cell division as it travels down the fallopian tube towards the uterus. By the end of week 4, the zygote implants itself into the uterine lining, initiating the process of embryonic development. Weeks 5-8: Embryonic Development By the fifth week of pregnancy, the embryo begins to take shape as distinct layers of cells form the foundation for future organs and tissues. The neural tube, which will eventually develop into the brain and spinal cord, starts to close, and the heart begins to beat, albeit faintly. As the weeks progress, the embryo undergoes rapid growth and development, with essential organs and structures taking form. By the end of the eighth week, the embryo is referred to as a fetus, and all major organ systems are present, though they are not yet fully developed. Expectant mothers may experience a range of symptoms during these weeks, including morning sickness, frequent urination, mood swings, and heightened sensitivity to smells. Weeks 9-12: Fetal Growth and Maturation During the ninth to twelfth weeks of pregnancy, the fetus experiences a period of rapid growth and development. Facial features become more defined, and limb movements become more coordinated. External genitalia begin to differentiate, though it may not yet be visible on ultrasound. Meanwhile, expectant mothers may notice changes in their bodies as pregnancy progresses. The uterus continues to expand, causing the abdomen to protrude slightly. Some women may experience relief from early pregnancy symptoms such as nausea and fatigue, while others may continue to experience these symptoms throughout the first trimester. Weeks 13-16: Second Trimester Begins As the second trimester begins, many expectant mothers experience a newfound sense of energy and well-being, often referred to as the "honeymoon phase" of pregnancy. Nausea and fatigue may diminish, and appetite may increase as the body adjusts to the demands of pregnancy. During these weeks, the fetus undergoes significant growth and development, with facial features becoming more distinct, and bones and muscles strengthening. The fetus may begin to move and kick, though these movements may not yet be felt by the mother. Expectant mothers may undergo routine prenatal screening tests during the second trimester to assess the health and development of the fetus, including ultrasound scans, blood tests, and genetic screenings. Weeks 17-20: Maternal Changes and Fetal Growth Embarking on the Journey: Navigating Pregnancy Week by Week Pregnancy is a remarkable journey marked by profound physical changes, emotional fluctuations, and the anticipation of new life. From conception to childbirth, each week of pregnancy brings unique developments and milestones as the baby grows and develops within the womb. In this comprehensive guide, we explore the stages of pregnancy week by week, offering insights into fetal development, maternal changes, and important considerations for expectant mothers. Weeks 1-4: Conception and Implantation The journey of pregnancy begins with conception, when a sperm fertilizes an egg to form a single-cell zygote. Over the next few days, the zygote undergoes rapid cell division as it travels down the fallopian tube towards the uterus. By the end of the first week, the zygote develops into a multicellular blastocyst and implants itself into the uterine lining, marking the beginning of pregnancy. During these early weeks, many women may not yet be aware that they are pregnant. However, some early signs and symptoms of pregnancy may begin to emerge, such as fatigue, breast tenderness, and mild cramping. Weeks 5-8: Embryonic Development By the fifth week of pregnancy, the embryo begins to take shape as distinct layers of cells form the foundation for future organs and tissues. The neural tube, which will eventually develop into the brain and spinal cord, starts to close, and the heart begins to beat, albeit faintly. As the weeks progress, the embryo undergoes rapid growth and development, with essential organs and structures taking form. By the end of the eighth week, the embryo is referred to as a fetus, and all major organ systems are present, though they are not yet fully developed. Expectant mothers may experience a range of symptoms during these weeks,...