Fetal Development And Human Development

In the first month of pregnancy head and trunk appear and tiny arm buds begin to form, followed by leg buds. The early embryo seems to have a "tail", but this is really a protective covering for the spinal cord because the central nervous system (brain, spine and spinal cord) is so important. At this point of development the structures that eventually form the face and neck are becoming

At one month of pregnancy the baby is still any embryo and it is made up of two layers which will soon produce into body parts and organs. In the first two weeks of pregnancy a women isn’t actually pregnant because the women’s body is preparing for ovulation as usual. You usually ovulate (release an egg) around two weeks after the first day of your period this depends on the length of your period. Then during the third week after the first day of your last period your fertilised egg moves across the fallopian tube towards the womb. The egg starts off as a single cell but it divides multiple times. By the time the egg reaches the womb it becomes the mass of 100 cells which is known as an embryo. In the fourth week of pregnancy the embryo grows and develops in the lining of the womb. The outer cells reach out and link themselves with the mothers blood supply. The inner cells form

Even though most people think the scientific terms, fetus or embryo, is talking about the cells or tissues, the terms really refer to the stages of development. This means that the fetus is not just a small piece of tissue, but a human life. “The beginning of a single human being from a biological viewpoint is a simple, straightforward matter—- the beginning is conception.” (Bowes).

S: Page 134 is all about the embryonic period of pregnancy. The embryonic period lasts from week 3 to week 8, and it is a very important time because that is when the ectoderm, mesoderm, and endoderm are being formed. The ectoderm, mesoderm, and endoderm will later for more important oragans and body structures.

Biological development of a fetus is vary rapid and complex over the nine-month period in the womb. When both the male spermatozoon and the female ovum combine it forms what is called a zygote which holds the twenty-three pairs of chromosomes. The zygote or the embryo undergoes cell division and makes its way to the uterine wall to implant itself, this process is completed about ten days after conception. By the end of the eighth week the organ systems have formed and human characteristics can start to be noticed. From the eighth week until birth the embryo is now labeled a fetus. Quickening can occur from the sixteenth week until birth, this is where the mother can feel the fetus moving. Around the twenty-second week viability can take place, this is where the fetus can survive outside the womb. The nine-month period of being pregnant is split into different trimesters. With the different trimesters there are different abortion procedures can be used to remove the fetus.

When an embryo becomes a fetus at eight weeks, it is approximately 3 centimeters; by the time the fetus is considered full-term, he or she may be 50 centimeters (Brisbane 60). The fetal stage, that takes place during week 9 to birth, result in a whole bunch of changes. (Brisbane 61). During the fetal stage, all parts of the body mature, and the overall of the baby size increases. Although all of the organ systems were formed during embryonic development, they continue to develop and grow during the fetal stage as well. During the third month, the reproductive system becomes developed and the sex of the baby becomes apparent (Staff). For girls, the ovarian follicles begin to form and for boys the prostate gland. Throughout months four through six, the heartbeat grows stronger and other body systems become further developed (Brisbane 63). Features such as fingernails, hair, eyelashes and toenails form. During the period from seven months until birth, the fetus continues to develop, put on weight, and prepare for life outside the womb (Brisbane 64). The lungs begin to expand and contract, preparing the muscles for breathing (Brisbane 64). The time in which the baby is born is a very critical. In some situations, a baby can be born as early as 7 months. When a baby is born too early, his ar her organs are not usually fully formed. This can result in many complications and health problems. Including, If premature pregnancy is the case, the baby would need some intensive care in hospitals. If the baby survives the stages, at the end of the nine month of pregnancy the baby will turn to a head-down position to prepare for birth. If the baby is not in the head-down position and in breech position a cesarean section may be required, which can cause many more complications. If a baby passes all these crucial factors, it is guaranteed to be born

A common teratogen that causes problems in pregnancy is the use of methamphetamine, a stimulant that affects a person’s central nervous system, by the potential father or mother. Research on methamphetamine abuse among pregnant women is in progress and has been for several years, but the exact effects of prenatal exposure to this drug are still actually limited. It is common for a child of a mother who used meth during pregnancy to have brain development problems. The National Institute on Drug Abuse(NIDA), (2013) informs us that there have been only small samples of pregnant women researched for only using methamphetamine, therefore, the results are limited to knowing that “neurobehavioral problems such

If born at this time, the baby will be considered premature and require special care.

Physical development of the human begins at conception when the egg is fertilized by the sperm. Once the ovum is fertilized, the process of mitosis begins, allowing the cells to split and form the human being. Through this process, each parent contributes 23 chromosomes, which are present in every cell of our bodies, and are made up of DNA and genes (Broderick & Blewitt, 2015). The genes that we inherit from our parents determine our physical features, such as hair and eye color, and height. Furthermore, the combination of various genes within the body at the time of conception may result in the individual carrying unexpected traits and illnesses (Broderick & Blewitt, 2015).

Due to modern medicine, there are many ways that pregnant women can now see how their fetus is growing inside them. The woman’s egg travels down the fallopian tube entering the uterus. It is fertilized by the sperm and its home for the next nine months. There is a long process before the baby arrives into the mother's arms. This is the beginning of conception and the development of the baby.

The author James Gallagher said “Over the course of the first seven days, a healthy, normal embryo goes from one cell to about 200. It also goes through the first steps of organizing itself and handing out specialized jobs to different cells”(BBC). James Gallagher used Logos in this quote to inform the reader of what normally happens in a human embryo.

    According to parents.com, after conception, a fetus begins to develop rather quickly. In the fifth week of pregnancy, a baby’s heart begins to beat. A baby also develops three distinct layers, ectoderm, endoderm, and mesoderm. These three layers will eventually form the body systems that are necessary

First trimester: By 12 weeks of pregnancy the foetus will be fully formed. The ovum grows and develops certain important parts of the baby’s body such as spinal cord, nervous system, gastrointestinal system, heart and lungs in the first four weeks from conception. The heart starts beating and brain and other organs forms by eight weeks. At this stage, the face is formed and arms and legs start to move. The baby grows to 3 inches long and

The fetal stage is the stage in which is marked by rapid growth and preparation

Infant development is inseparable from the progression of the infant’s relationship with caregivers. Contemporary accounts of the early comments highlighted the role of parents and other guardians in supporting infants gradually (Lyons-Ruth & Zeanah, 1993). This is because the infant needs parents who can help her negotiate the developmental task. Thus, there are 4 stages to develop which is birth to 4 weeks, age 1 to 3 months, 3 to 6 months and 6 to 12 months.