Fertilisation

Stem cell research has caused tremendous controversy over the latest years. Because embryonic stem cells are pluripotent and undifferentiated, they have the potential to become any cell in the adult body and are present in all living organisms. Tissue (adult) stem cells are taken from specific parts of the body, but can only give rise to their tissue of origin. These tissue cells are used naturally by the body to replace damaged cells. Research into both of these types of cells seems very…

Within the first few days of their fertilisation they are made up from 150 cell types and have the potential to be physically adjusted to become a stem cell and are pluripotent, meaning they can develop into any type of cell type in the human body. Problems with embryonic stem cells are that…

Animal Cloning As new technology is developed, cloning becomes a higher discussed topic. Cloning is the process of producing similar populations of genetically identical individuals. Cloning has been seen a as a recent discovery but cloning has been happening in nature since the beginning of time. Common animals that clone naturally are starfish, bacteria, and even some plants. But cloning becomes a controversial topic when humans artificially make clones of animals that normally reproduce…

should twenty-eight weeks still be applicable? With the law at this time, if the doctor had carried out an abortion after this time, then they may fall under the scope of this Act and commit an offence of child destruction. In 1990, the Human Fertilisation and Embryology Act (HFEA) amended the Abortion Act 1967. S37 of the HFEA had replaced S1 (1) of the Abortion Act 1967. Now, S1 (1)(a) of the Abortion Act 1967 states that there will be no offence of abortion if two doctors, in good faith…

Different Methods of Contraception How it works Advantages of Contraception Disadvantages of Contraception How effective is it against Contraception How effective is it protecting you against HIV Natural Family Planning (Rhythm method) A menstrual calendar is used to predict when the woman will be fertile and when she is less at risk of fertilization taking place. It also involves the woman taking her temperature regularly. The women can then work out when she must avoid intercourse and when she…

want, so my question is, should having an abortion be made illegal? The first stage of pregnancy is fertilisation, when the sperm and egg meet. After about six days the blastocyst (Sperm + Egg) begin to try and burrow into the uterus wall. 60 to 80% of blastocyst fail to implant into the uterus wall and get flushed away in the next menstrual cycle. After roughly two weeks since fertilisation it starts to form into…

Conditions like Huntington's disease could become disease of the past, in the same way that global vaccination programmes have eradicated diseases like polio . Against Germline gene therapy would never be effective enough to rule out the need for post-fertilisation screening of embryos. Germline gene therapy involves more steps and introduces additional risks to the embryo compared with IVF and screening for healthy embryos before implantation. Is gene therapy affordable For If germline gene…

According to Simon and Farndon (2008), genetic disorders are abnormalities in an individual 's gene or set of genes which could be due to mutations in the DNA. Also, there are thousands of genetic diseases that can occur as it is estimated that the average rate of genomic mutation is about 2x10-8 per nucleotide per genome (Nachman and Crowell, 2000). Furthermore, they can be grouped into three types named single gene disorders, chromosomal disorders and multifactorial conditions (Milewicz, 2007)…

typhoid. This made me curious to discover how doctors treated these illnesses. Seeing these conditions helped me realise how challenging medicine can be and the importance of interacting with people in the community to support them. Learning about fertilisation, in Biology and having attended a Robert Winston lecture on ‘Reproduction and Genetics’ have increased my knowledge of the constant development within the medical field. Studying Chemistry in addition to this has helped me to appreciate…

2011). The depolarisation of these neurons occur periodically, which gives rise to the spontaneous tail coiling behaviour (Saint-Amant and Drapeau, 2000). The slow depolarisation arises early on in development from between 17 and 20 hours post fertilisation to produce action potentials for the initiation of activity (Brustein et al.,…