Introduction A molar pregnancy (hydatidiform mole) is a mass of tissue that grows in the uterus after conception. The mass is created by an egg that was not fertilized correctly. The egg then abnormally grows. It is an abnormal pregnancy and does not develop into a fetus. If a molar pregnancy is suspected by your health care provider, treatment is required. What are the causes? This condition is caused by an egg that is fertilized incorrectly so that it has abnormal genetic material (chromosomes)
parts of the embryo they use could also grow into a fetus. When harvesting the stem cells of an embryo, the destruction of the blastocysts, “the blastula of the mammalian embryo, consisting of an inner cell mass, a cavity, and an outer layer, the trophoblast” (Dictionary.com), must occur. This kills the embryo because taking away the stem cells strips the organism of the ability to develop. The use of live embryos in research is wrong because it takes an innocent life. Consequently, using embryos for
• Define gestational age compared to developmental age • Explain the trimester system of embryological development • Describe the development on a week by week basis throughout pregnancy from the time of fertilization to birth • Understand the stages of development that are sensitive to abnormalities and are at an increased risk of spontaneous abortions • Define aneuploidy and explain its significance to spontaneous abortions • Define confined placental mosaicism, explain how it occurs and why
Deception in the Stem-cell Research Debate The Nobel laureates' inaccurate letter to President Bush urging him to feed federal funds to human-embryo stem-cell research has had PR value in the media. It perpetuates a number of misconceptions and misleading statements regarding stem-cell research, particularly embryonic as opposed to adult stem-cell research, and will serve to continue to cloud the issue. Some of these deceptive statements are the subject of this essay. I believe President Bush
Over the years, a high-fat diet has been common among many pregnant individuals. A maternal diet plays a key role into growth and development of the fetus. Dietary fat is an essential nutrient that helps the body function by providing protection, fuel and absorption for cells, tissues and organs. Foods consumed as fat are Triglycerides. The mechanism behind this process is for lipoproteins (LPL) to break the triglycerides into smaller components, as they’ll be absorbed for performing activities,
Histologic and Anatomical Aspects of placenta The placenta is an organ that affects the environmental conditions for fetal development . First all substances which enter the fetal circulation have passed through the placental parenchymal cells. Second the placenta secretes several hormones and growth factors that affects maternal and fetal metabolism. The placenta is highly sensitive to maternal and fetal signals and may adapt its properties to support the development of fetus. The ability
The Ethics of Stem Cell Research "What Are Stem Cells?" University of Nebraska Medical Center. N.p., n.d. Web. 28 Aug. 2014. web <http://www.unmc.edu/stemcells/whatare.htm>. What is a stem cell, its functions, how do they pertain to my topic? There are many avenues of discussion and debate concerning the research of stem cells and the ethical morality and political implications surrounding this controversial topic. Stem Cells are the building blocks of life and all living matter and organisms
What Are Stem Cells? Stem cells are a group of identical cells which develop and grow into different types of cells. According to Medical News Today, in most common situations, stem cells form from embryo's and adult tissue, which are also known for their potential to develop into different cells. Embryonic Stem Cells Figure 1: Visual description of the development and function of an adult stem cell "Embryonic stem cells are derived from a four- or five-day-old human embryo that is in the blastocyst
throughout her life. Egg cells are covered in a growth of epithelial tissue called follicle which will eventually release a mature egg. This dominant follicle is then instructed to begin dividin... ... middle of paper ... ...ty with the surrounding trophoblast being called the amnion. The amnion, also known as the amniotic membrane is a thin membrane on the inner side of the fetal placenta which completely surrounds the embryo and delimits the amniotic cavity, which is filled by amniotic liquid. (Biophysics
been identified as well (textbook). Scientific theories suggest preeclampsia could be derived from oxidative stress, immunologic intolerance between the placenta and mother, genetics, inflammatory factors, maternal vascular disease, superabundant trophoblast tissue, and angiogenic imbalances (Bell, 2010). It is known that preeclampsia can lead to low fetal birth weights resulting from decreased placental perfusion related to the mother’s increasing blood pressure and vasospasm. Poor placental perfusion
Organogenesis takes its roots from two Greek words: organon, an instrument, tool, or organ, and genesis, a beginning or creation. With this in mind, one can intuitively infer the basic meaning of the word organogenesis; that is, the creation of an organ. What it means in context to medicine, however, may not be so easily predicted. If any man (or woman, for that matter) of medicine fifteen years ago was asked about the meaning of organogenesis, he or she may tell you that it is the development of
created in IVF (in vitro fertilization) clinics where several eggs are fertilized in a test tube, but only one is implanted into a woman (Crosta, Paragraph 3). The blastocyst consists of an inner cell mass (embryoblast) and an outer cell mass (trophoblast). The outer cell mass becomes part of the placenta, and the inner cell mass is the group of cells that will differentiate to become all the structures of an adult organism(Crosta, Paragraph 4). In a healthy pregnancy, the blastocyst stage continues
The thyroid, part of the endocrine system, is a butterfly shaped organ located in the neck superior to the collarbone and inferior to the Adam’s apple. It consists of two lateral lobes, which are then connected by a median tissue mass called the isthmus. Also, the thyroid helps in maintaining metabolism (process by which cells use energy) by producing two hormones known as triiodothyronine (T3) and thyroxine (T4). In an over productive thyroid (hyperthyroidism), T3 and T4 are going to be overproduced
Placental abruption is a condition in which premature separation of the placenta from the uterus. Women with placental abruption, also called abruptio placentae, usually present with bleeding, uterine contractions, and fetal distress. Complications such as a risk for recurrence in women who have experienced placental abruptions previous in other pregnancies. Understanding the leading cause to contributing factor of placental abruption, is understanding the origin of the condition. Associations that
Abortion is Morally Wrong Abortion, the termination of pregnancy before the fetus is capable of independent life, can either be spontaneous or induced. It is called "the knowing destruction of the life of an unborn child." (Mass General Laws Chapter 112 Section 12K) When abortion occurs spontaneously, it is called a miscarriage. However, when the loss of a fetus is caused intentionally, it is regarded as a moral issue. Abortion destroys the lives of helpless, innocent children and is illegal
transforms it into a hollow sphere called a blastula, which implants itself into the inner lining of the uterus, the endometrium (Fig. 1). The inner mass of the blastula will produce the embryo, while the outer layer of cells will form the trophoblast, which eventually will provide nourishment to the ovum (Pritchard, MacDonald, and Gant, 1985). Figure 1:Implantation process and development during embryogenesis (Pritchard, MacDonald and Gant, 1985) During the second week of development
1.0 Introduction I have always been fascinated by conjoined twins and have always had questions about them like; what do the Siamese have to do with conjoined twins? Why does this form of twin happen? What, if any genes cause this? What types of Conjoined twins are there? How does the environment affect, if at all, the biological families' gene pool? In my research in efforts to prepare this paper, I found the answers to this question and many more. This term paper will cover the types of conjoined