text: Science has moved on dramatically since the C19th. Many new things have been invented and many things medically have changed. People in our modern times are now able to have liver, heart and even lung transplants, there are many complications but many are succesful. People are able to have a whole new blood supply if theirs lacks the sufficient requirements or, a bone marrow transplant if the blood lacks white cells. All the above are carried out on living people, but nowadays biological operations can be carried out on humans which are not even born.
  	Bodies can start their days in a test tubes. This is called 'in vitro fertilisation'. This is when an egg is removed from a woman placed in a test tube and then sperm is placed in to the test tube and the egg and sperm fuse together. The test tube is then incubated for a few weeks and when the fetous is formed, the baby is then inserted back in to the mother. The fetous is left to grow and develop naturally. This idea is extremely benificial to married couples who have been trying for a baby but have been unsuccesful are able to have children. An in vitro fertilisation allows the baby to grow inside, which allows the mother and baby to bond and it would feel apart of her, this would not happen if the couple adopted. What I do feel is ethically incorrect is when a woman who is post-menopausal decides she wants a baby. Nature has already taken its course to tell her she is too old to have any children so why should she have one implanted into her. It is not fair on the child because when it grows up and all its friends are playing with their 30-40 year old parents, its mother could be drawing her pension and I am sure she would not feel like playing with her child. Also the mother may die of old age before the child has led a full life and this would be unfair to the child. The child may also have to look after the mother in her old age.
  	As the fetous begins its life in a test tube, and the sperm is selected, this means that the sex of the sperm could also be selected. The way the sex can be chosen is by using genetics. The women has 2 X chromosomes and the man has one X and a Y-chromosomes. The way in which the sex can be selected is that the egg is always X and the sperms nucleus can either contain an X or a Y chromosome. The X chromosome sperm is slightly heavier than the Y so they can be separated. If the mother wants a boy Y sperm is selected and if a girl X is selected. This may lead to an increase in one sex, and a decline in the other. As a result this would reduce the population as there would be less couples. Also what happens if most people the year you are born are men and you are a woman, this would be the unpopular sex.
  	Science is progressing all the time, but is it for the best?
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