Prenatal Human Development

Development of the embryo into a fetus throughout pregnancy consists of three main periods of development, made up of several weeks of development between each one; these are referred to commonly and by medical professionals as the first, second, and third trimesters of pregnancy. Following conception, the embryonic stage of prenatal development begins through the fifth week of pregnancy in which major structures begin to form. At this stage, the cells of the body begin to differentiate into cells that are specialized in unique functions such as blood, kidney, and nerve cells for their corresponding organ systems (Hill, 2016). According to Sacks

The prenatal period takes place in the first two weeks of conception. Heredity and environmental influences (which are often negative) are also developed during this stage. At this stage the organism is more susceptible to these influences, than during any other period. Infancy is the next stage, various changes start to occur and attachments start to form. Coordination, sensory and motor skills start to develop, as well as the expression of

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.

As a child is developing in the womb, its development can be affected at this time, for instance if the mother smokes or uses drugs or excessive

Anything a mother consumes will affect her baby’s health, either positively or negatively. After the sperm enters into the egg, instantly, the baby begins to grow inside of the placenta, which is inside of the mothers’ uterus. “The placenta has been described as a pancake-shaped organ that attaches to the inside of the uterus and is connected to the fetus by the umbilical cord.” As the placenta produces the hormones for the baby, it also supplies the blood to the fetus from the mother. The most important element that allows the fetus to grow is the umbilical cord. The umbilical cord is composed of three blood vessels that attach to the placenta and the fetus. All of these components help the baby’s growth, but the amniotic sac, which is composed of amniotic fluid, helps protect the fetus. The amniotic fluid helps the baby maintain a regular body temperature that

A teratogen is any agent or factor that can disrupt the development of an embryo or fetus, which may cause a birth defect or malformation. Whether it is a medication, disease or drug, when the mother is exposed the chances of problems arising with the baby increase. Only ten to fourteen days after conception teratogens can affect the fetus. At that stage in the pregnancy the egg has already been fertilized and attached to the uterus. This is known as the embryonic stage where if health isn’t a priority complications can occur. At this point the mother and embryo share a common blood supply therefore anything the mother does affects the embryo. This is also the stage in which most miscarriages occur. There are numerous teratogens but two

It is imperative for a mother to take care of herself while pregnant. This will give the fetus a better chance at healthy developmental milestones. One way to achieve this is through a healthy diet which aids fetal brain development. Moreover, taking the supplemental vitamins recommended by the physician helps too. Finally, a mother should try to eliminate too much stress in her life while pregnant. This can have a negative impact on the pregnancy. This is what healthy development looks like during conception. At 3 months the baby is fully formed. The hands, arms, feet and toes are all present. Also, the bodily organs are present but need to mature more at this point. During the 3-6 month period is where the most rapid brain development takes place (Hutchison, 2013). This is the trimester where you begin to feel movement. At 6-9 months the baby continues to grow and mature to prepare for entry into the world.

Teratogens can harm an embryo. Most will not kill an embryo. However, any large quantity of teratogens like nicotine will

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).

    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

Human development research refers to pregnancy loss in young and older women. The embryonic stem cell can be used to determine developmental issues that can arise during pregnancy. For instance, genes are known to be turned on and off during development (Stem Cell Information, 2015). When this is done at the wrong time it can lead to abnormal growth

An egg at each developmental stage (24, 28, 72, and 96 hour) were obtained with their blunt end positioned up because the embryo will be sitting just below the air space, while the yolk gravitates to the bottom. Each egg was opened from the blunt end by removing the shell membranes with forceps and scissors. The embryos of each stage were taken out by a technique that consisted of the embryo attaching to a filter paper, and then getting cut around the ring with scissors. The embryo was transferred to a small petri dish with Howard’s Ringer’s solution. Each embryo was examined and compared to one another.

There Is a lot of challenges an embryo or fetus can face while developing. The stages of conception is a very distinct and detrimental stage, and so therefore, certain things need to be taken in consideration and precaution. The following include; malnutrition, drugs, alcohol, infected parents etc. As we go on we see more deficits that can be harmful to a growing fetus or embryo face.

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