Nobody downloaded yet

The effect of nitric oxide and cGMP on follecogenises - Essay Example

Comments (0) Cite this document
Infertility has been described as “Failure to conceive after at least 1 year of unprotected coitus” in the glossary prepared by the International Committee Monitoring Assisted Reproductive Technologies (ICMART, Zegers-Hochschild et al., 2006). According to worldwide…
Download full paperFile format: .doc, available for editing
GRAB THE BEST PAPER93.5% of users find it useful
The effect of nitric oxide and cGMP on follecogenises
Read TextPreview

Extract of sample
"The effect of nitric oxide and cGMP on follecogenises"

Download file to see previous pages to female disorders, 20% of male origin, 27% resulting from abnormalities in both man and woman, while 15% of the cases could not be attributed to either partner (de Kretser, 1997). According to Evers (2002), five types of disorders leading to infertility have been recognised. They are summarised in Table 1.
Ovulation disturbances are a common cause of subfertility in women (Snick et al., 1997). Ovulation problems due to disturbances in reproductive hormones present themselves as irregular or absent menstrual periods viz., oligomenorrhoea or amenorrhoea (Hamilton-Fairley and Taylor, 2003). Hormonal balance governing the ovarian cycle is a critical factor in female fertility. Several factors including stressful lifestyles, extremes in body weight, diet, certain hormonal diseases (e.g., pituitary gland tumours) and endocrine disrupting chemicals, such as PCBs and some pesticides can impact a womans hormonal balance and, thereby, the ovulatory pattern (Farr et al., 2004). Age is another important factor that influences female fertility (Maheshwari et al., 2008) which starts to decline around the mean age of 37.5 years (Hourvitz, 2009). Fecundity of a woman declines with age because of the loss of follicles from the ovary. Advancing age could lead to infertility in a woman on account of poor oocyte quality related to a higher number of chromosomal aberrations and cytoplasmic malformations in the oocytes (Laufer et al., 2004). Furthermore, advancing maternal age could adversely influence the capacity of the oocyte to sustain early embryo development vis-a-vis biochemical and molecular processes promoting fertilisation, embryo formation and successful development to term (Gilchrist et al., 2008);
Male infertility resulting in the reduced ability of the female partner to become pregnant is usually on account of low sperm counts, obstructive azoospermia or primary spermatogenic failure including reduced motility and/or abnormal morphology of sperm (Snick et al., 1997); ...Download file to see next pagesRead More
Cite this document
  • APA
  • MLA
(“The effect of nitric oxide and cGMP on follecogenises Essay”, n.d.)
The effect of nitric oxide and cGMP on follecogenises Essay. Retrieved from
(The Effect of Nitric Oxide and CGMP on Follecogenises Essay)
The Effect of Nitric Oxide and CGMP on Follecogenises Essay.
“The Effect of Nitric Oxide and CGMP on Follecogenises Essay”, n.d.
  • Cited: 0 times
Comments (0)
Click to create a comment or rate a document
Use of Nitric Oxide in Infants
...oxygenation but also improves treatment outcomes (1). In infants with increased pulmonary vascular resistance secondary to right ventricular failure or in cases of primary persistent pulmonary hypertension doses between 2- 40ppm are effective in decreasing pulmonary vascular pressures (2). Other than primary persistent pulmonary hypertension, nitric oxide therapy is also useful in acute respiratory distress syndrome, interstitial pulmonary fibrosis and cardiac surgery. Mode of action Nitric oxide is naturally generated in the endothelium of the lung. It is derived from L-arginine after activation of the enzyme nitric...
8 Pages(2000 words)Research Paper
Nitrous Oxide
...Literature Review Nitrous oxide is a greenhouse gas that also plays a role in the cycling of stratospheric ozone. Air samples from the lower stratosphere exhibit 15N/14N and 18O/16O enrichment in nitrous oxide, which can be accounted for with a simple model describing an irreversible destruction process. The observed enrichments are quite large and incompatible with those determined for the main stratospheric nitrous oxide loss processes of photolysis and reaction with excited atomic oxygen. Thus, although no stratospheric source needs to be invoked, the data indicate that present understanding of stratospheric nitrous oxide chemistry is incomplete. Nitrous...
4 Pages(1000 words)Essay
Asthma and nitric oxide
...the effects of NO by inhibiting the enzyme that normally breaks down cGMP. Fireflies Use NO To Turn On their Flashes Link to a discussion. Plants Also Use NO NO has been implicated in many plant activities. It is a weapon against invading pathogens. Infection of the plant triggers the formation of a NOS, that like the animal versions, makes NO from arginine. Release of NO by the infected cell induces a number of defense responses. A gradient of NO may also guide the pollen tube to its destination in the ovule [Link]. The popular prescription drug sildenafil citrate (Viagra) enhances its effect on pollination (just as it does on penile erection). NO inhibits flowering. NO promotes...
7 Pages(1750 words)Essay
Ethylene Oxide is a Carcinogen
.... The research methodologies pertaining to the occurrence of EtO is also described. 1. Ethylene Oxide: Ethylene Oxide (C2H4O, EtO) is used as a sterilant in the pharmaceuticals and food industry(4). It is used as a sterilant since its biocidal, both bactericidal and fungicidal. Most of the sterilants available in the market have their own advantages and disadvantages, similarly Ethylene oxide also has its own side effects, for instance ethylene oxide is toxic by inhalation. It is rapidly taken up via lungs and can also be absorbed through the skin from the gas phase or from the aqueous solutions and is uniformly distributed in to the body as it is...
14 Pages(3500 words)Essay
Contacts to ZnO (zinc oxide)
...performance of the diodes with Schottkey contacts increases when the semiconductor surface is treated with nitric acid. Furthermore, it also discusses that most researchers believe that owing to issues of tunneling, interface states’ effects along with the effect of deep recombination centers, the ideality factor of these semiconductor diodes with Schottkey contacts increase greatly from 1. Additionally, it states that the rectifying property of the ZnO semiconductor with Pt or W contact is improved when the semiconductor surface is treated with the UV-Ozone cleaning before either of the metal is deposited. The direct deposition of Pt metal on ZnO semiconductor surface requires the...
14 Pages(3500 words)Research Paper
Nitric Oxide Production in Cytokine Activated Macrophages
...Nitric Oxide Production in Cytokine Activated Macrophages Background Microphages play a key role in the regulation of adaptive and innate immune responses via intracellular and phagocytosis digestion of apoptotic cells, microorganisms, and inflammatory byproducts, and the secretion of chemokine, cytokines, and reaction nitrogen and oxygen intermediates (Albina, 1993). Simulation of the macrophages with the cytokines such as IFN-γ, IL-1α, IL-1β, TNF-β, IL-6, and TNF-α, which are secreted during various processes of immune responses, result in synthesis of NO (NOS). NOS causes the macrophages to become cytotoxic against tumor cells, microorganisms, and normal cells (Chong, 2005). Apoptosis plays an...
5 Pages(1250 words)Lab Report
Zirconium Oxide Manufacturing
...using sodium either sodium oxide or sodium carbonate and these results in the formation of zirconium hydroxide and zirconium carbonate and from the hydroxide of zirconium, zirconium oxide can be obtained. The energy flow diagram represented as shown below. Figure 1: The energy flow diagram for industrial production of zirconium oxide. Conclusion From the discussion above, it possible to achieve an energy efficient system that can be used to manufacture Zirconium oxide in and industry and this requires that the proper temperature and time period is maintained for the reactions to take place effectively. References Hampel, Rare Metals Handbook,...
2 Pages(500 words)Essay
Final Project Of Zirconium oxide
...Industrial Production of Zirconium Oxide Summary Table Raw material (zirconium sand) 70,000 kg Fossil fuel use 5.6kJ/kg Steam use 2.8kJ/kg Electricity 10kwh/kg Water use 1.2kgwater/kgproduct Environmental management 0.8kg/kJ Zirconium oxide (ZrO2) is a compound formed from zirconium. Zirconium occurs in compound forms in igneous rocks. The most dominant mineral containing this element is the zircon silicate. Zirconium oxide is the raw material for the manufacture of most ceramics in its pure form (Dhanaraj & Govindhan 444). This compound has special properties that make it suitable for ceramic production. The production of Zirconium oxide occurs in large scale. There...
3 Pages(750 words)Research Paper
The Effects of Delivering Nitric Oxide
...The Effects of Delivering Nitric Oxide At level 2 new born, the care of infants with a rectified gestational age of 8 months or greater and Is estimated to weigh about 1500 g. These babies have moderate illnesses that can be resolved quickly. This can be babies who usually convalescing after they are removed from intensive care. In this stage, there is resuscitation and stabilization of all the babies is important before they are transferred to the care facility. The babies are usually under nasal oxygen and saturation monitoring. For a full term new born, the average birth weight is approximately 3.4 kg. Over the first week following birth, the body weight decreases to about 6-7 %....
1 Pages(250 words)Coursework
Empirical Formula of Magnesium Oxide
...Empirical Formula of Magnesium Oxide Introduction Magnesium is an alkaline earth metal that can react with to form Magnesium Oxide (Shipman, et al., 2015). Magnesium is a greyish-white metal that burns with a blinding glare. The atomic number of Magnesium. In the 18th century, the French chemist Antoine Lavoisier was busy performing very many combustion experiments. After some time, Lavoisier realized that even though the reaction characteristics of the materials varied the total mass of the products was similar to the total mass of the reactants. Lavoisier summarized his observations in the law of conservation mass, which states that mass is neither created nor destroyed (Erdey, et al., 2013). The...
6 Pages(1500 words)Lab Report
sponsored ads
We use cookies to create the best experience for you. Keep on browsing if you are OK with that, or find out how to manage cookies.
Let us find you another Essay on topic The effect of nitric oxide and cGMP on follecogenises for FREE!
Contact Us