Essays Tagged: "Fertilisation"

Investigation of Reproduction and Development in Animals

rmed in the follicle secretes progesterone that prepares the lining of the uterus for pregnancy. If fertilisation does not occur the lining of the uterus is discharged from the body in the process cal ... es wishing to have children of their own. These methods include: donor insemination, IVF ( in vitro fertilisation), ZIFT, GIFT and so on.What is IVF?IVF involves fertilization outside the body in an a ...

(3 pages) 62 0 4.6 Jan/1996

Subjects: Science Essays > Zoology

Roman Catholic Church's belief on In Vitro Fertilisation

There has been an extensive history in the development of In Vitro Fertilisation.This is evident in the scientific discoveries and advances in medical procedures.In ad ... dition, the church and society have made scientific contributions to the debate concerning In Vitro Fertilisation techniques.The discovering of human ova and sperm during the 1800's provided a greater ... in the encyclical human Vitae.Despite the churches stance on the issue, the development of In Vitro Fertilisation techniques continued and resulted in the birth of the first IVF baby, Louise Brown in ...

(2 pages) 60 0 3.8 Aug/2003

Subjects: Art Essays > Artists

Should IVF be used fior non-medical reasons?

Argumentative- IVF Essay.In Vitro Fertilisation was first developed in the 1970's. Since then thousands of "test tube babies" have bee ... er and baby. Therefore many people question should we be able to use IVF for these reasons?In Vitro Fertilisation involves eggs being extracted from the ovary and then mixed with the sperm in a glass ... d that there had been a mix up. Both couples have been through a traumatic experience and the human fertilisation authority now has tightened procedures to ensure this never happens again. Cases like ...

(5 pages) 55 0 4.5 Feb/2004

Subjects: Law & Government Essays > Law

Biology Revision.

ian ExperimentHe noticed pea plants were either full sized (tall) or very short (dwarf)He used self fertilisation to find PURE BREEDING PLANTSThen produced offspring by FERTILISATIONAll plants grew ta ...

(15 pages) 183 0 4.5 Feb/2004

Subjects: Science Essays > Biology

Infertility and Religion

are some of the treatments available to help infertile couples and also how it is done:(i) In-Vitro-Fertilisation (IVF):In this treatment, an egg is released from the ovary and united with a sperm. Th ... s treatment, an egg is released from the ovary and united with a sperm. This union, which is called fertilisation, takes place in a test tube in a laboratory which provides correct conditions for fert ...

(6 pages) 53 0 5.0 Feb/2004

Subjects: Social Science Essays

Open Ended Investigation on Earthworms

placed. The 2mm cocoon eventually slips off the worm's head end and closes, becoming lemon-shaped. Fertilisation occurs inside the cocoon. This elaborate procedure is designed to prevent self-fertili ...

(4 pages) 33 0 4.0 Mar/2004

Subjects: Science Essays > Biology

Briefly discuss the stages of the lifespan. Choose one stage and discuss the needs of a person at this stage.

ure, education and socialisation.The prime stage, and beginning of life, is conception. This is the fertilisation of male sperm and female ovum. The pregnant mother must lead a healthy lifestyle as wh ... conception that both parents lead a healthy lifestyle as many aspects may infect the sperm prior to fertilisation, and medical disorders may be passed to the child.Once the child is born they have ent ...

(5 pages) 164 2 4.6 Jul/2004

Subjects: Social Science Essays > Society and community > Children and Youngsters

Essay on reproductive isolating mechanisms (1500 words)

zygotic mechanisms.Prezygotic isolating mechanisms are those mechanisms that isolate species before fertilisation i.e. before a zygote is formed. They include geographical, ecological, temporal, ethol ... solating mechanisms, which are effective after the union of gametes of different species i.e. after fertilisation. Postzygotic isolating mechanisms include hybrid inviability, hybrid sterility and hyb ...

(6 pages) 32 0 3.0 Sep/2004

Subjects: Science Essays > Genetics & Genome Projects


same length.We use an X to represent the longer sex chromosome and a Y to represent the shorter one.Fertilisation A woman has two X chromosomes, XX, while a man has one of each, XY. The two Xs or the ... coin, millions of times, you get roughly equal numbers of 'heads' and 'tails'. The many millions of fertilisations that made the population of the world tend to produce roughly equal numbers of boys a ...

(15 pages) 79 0 3.7 May/2005

Subjects: Science Essays


(6 pages) 15 0 0.0 Jan/2006

Subjects: Humanities Essays > Health & Medicine

In Vitro Fertilisation

(3 pages) 56 0 5.0 Mar/2006

Subjects: Science Essays > Biology > Human Biology

Invitro Fertilization Report

Q1) The Process of In Vitro FertilizationThe term In Vitro Fertilisation refers to the process in which the fertilization of an egg by a sperm takes place in a ... ll have their sperm injected into the eggs using ISI (Intracytoplasmic Sperm Injection).4) In Vitro FertilisationWhile the retrieved eggs are placed into a monitored Petri dish, the semen sample that ... ll confirm the development of a healthy baby.What are the risks and disadvantages of using In Vitro Fertilisation?* Medical injections can cause irritations and the many blood tests can lead to discom ...

(4 pages) 24 0 0.0 May/2006

Subjects: Science Essays > Biology

Life: a gift for man to treasure.

d contraception are NOT the same. Contraception simply disables the sperm from reaching the ovum so fertilisation is not able to proceed, while abortion occurs when a new life ALREADY exists and this ... fence against God, since a creation of God is being destroyed. The foetus is actually a life, since fertilisation has occurred. Every human life has dignity, and is created in the image of God: "a won ...

(2 pages) 27 1 3.8 Jun/2006

Subjects: Humanities Essays > Religion & Faith > Christianity

The Control Of Human Reproduction

tion from procreation. Yet an extraction from Henry Leese's "˜Human Reproduction and In Vitro Fertilisation' quotes from article 12 of The European Convention on Human Rights that "Men and women ... what extents should human reproduction be subject to intervention? Concentrating mainly on In Vitro Fertilisation, I wish to present arguments for and against this "˜interference' in human repro ...

(2 pages) 19 0 3.0 May/2001

Subjects: Law & Government Essays > Law

Implantation & Functions Of The Placenta

ich allow the trophoblast cells to multiply. After a period of approximately six to nine days after fertilisation, the blastocyst becomes embedded inside the endometrium "“ implantation. The trop ...

(2 pages) 10 0 0.0 Feb/2002

Subjects: Science Essays > Biology

Human Cloning

or animals that are genetically identical to another plant or animal. It is different from natural fertilisation which is "sexual" reproduction that occurs when a sperm fertilises an egg. In normal f ... e "embryo" as follows: "the term `human embryo or embryos' includes any organism that is derived by fertilisation, parthenogenesis, cloning, or any other means from one or more human gametes or human ...

(14 pages) 34 0 0.0 Mar/2009

Subjects: Science Essays > Biology


rds micropyle. In the fern cycle fertilization occurs in venter of the archegonium. In angiosperms, fertilisation occurs in the ovary of the flower which is situated at the base of the style. In angio ...

(3 pages) 1 0 0.0 Nov/2014

Subjects: Science Essays > Biology