This process is called conception, the female is now officially two weeks pregnant and the fertilized egg is called a zygote. Let’s move on to pregnancy. Pregnancy is a state in which a woman carries a fertilized egg inside her body, it usually lasts up to 40 weeks, and it is divided into three trimesters, each lasting three months. The first month. The embryo is about a third of an inch long.
It is divided into three equal trimesters (Holt, Rinehart & Winston) This period of one’s life span occurs the fastest and has one of the most important environments (Sigelman & Rider). Throughout the life of an embryo/fetus before it is born as a grown baby, there are several stages that their bodies have to go through. Cells that are formed earlier and have not been specialized yet can be identify as stem cells. When the spiral cord begins to form the embryo is coming into three weeks of growth and begins to have a system to support its body (Sigelman & Rider). This time is very vulnerable for the development of the baby’s organs (Holt, Rinehart & Winston).
(2011). "Designer babies" Ethical? Retrieved December 14, 2011, from http://www.cbsnews.com/stories/2009/03/03/earlyshow/health/main4840346.shtml Dixion, P. (n.d.). Designer babies. Retrieved December 3, 2011, from http://www.globalchange.com/designer.htm HumansFuture.
When do the most important parts of the fetus form? The first days and weeks after conception are critical for fetus body formation. The most extensive transformation of life occurs before birth. The fetal period goes through major changes. During the third month male or female sexual organs begin to develop and is visible through ultrasound.
The beginning of the third week after conception marks the start of the embryonic period, a time when the mass of cells becomes a distinct human being. The embryo begins to divide into three layers each of which will become an important body system (Cherry, 2015). Approximately 22 days after conception, the neural tube forms. Cherry (2015) argues that this tube will later develop into the central nervous system including the spinal cord and brain. Around the fourth week, the head starts to form quickly followed by the eyes, nose, ears, and mouth.
By the end of the third month, your baby is fully formed. All the organs and extremities are present and will continue to mature in order to become functional. The circulatory and urinary systems are working and the liver produces bile." Basically now is just for everything to mature and to grow with the baby as it grows. Also the major organ systems such as urinary, circulatory, nervous, ext... all start to form and perform in the fetus.
Puberty is initiated by hormonal signals that go to the brain then to the gonads, ovaries in female. (NHS Choices Puberty) A hormone is the produced by the gonads that stimulates the growth, function and transformation of the brain, skin, hormones, breast and sexual organs. During puberty it causes severally different changes, the physical changes are breast development, pubic hair, body shape (hips get wider), vagina and uterus, menstruation and body odour. (Wikipedia) The first phase, menstrual phase, also known as the period, begins on the first day of menstruation which last for five days. During this phase the uterus shed it inner lining of blood vessels and soft tissues which leave ... ... middle of paper ... ...erone, oestrogen and inhibin, to decrease so the uterus can get ready to get shed the tissues that were produce for the fertilized egg.
But once you reach week 42 of pregnancy , you’ll be overdue, at which point your doctor will induce labor if it doesn’t begin on its own. Your little one will get a whole lot larger in the third trimester, growing from about 2 1/2 pounds and 16 inches long in week 28 of pregnancy to between 6 and 9 pounds and 19 to 22 inches long in week 40. Indeed, your baby is growing fast, don 't be surprised if this
Retrieved March 1, 2012, from fda.gov: http://www.fda.gov/downloads/AdvisoryCommittees/CommitteesMeetingMaterials/PediatricAdvisoryCommittee/UCM289943.pdf U.S. Food and Drug Administration. (2012, January). Vyvanse drug facts. Retrieved March 1, 2012, from sharecontent.com: http://pi.shirecontent.com/PI/PDFs/Vyvanse_USA_ENG.pdf York University. (2008, January).