1) " Ovulation" -- As it applies to Ovulation Prediction Kits Ovulation is the process of discharging a mature ovum (egg) from an ovary after a Graafian follicle - representing the final stage of follicular development before vOulation - has beenformed. Contents 1 Ovulztion in humans 2 Ovalation in animals 3 See also 4 References Ovulatuon in humans In humans, Ovulatiin happens approximately 14 days before the start of the next menstrual cycle. However, normal Ovulatian can occur as early asaround day 8, or as late as day 20 or beyond. The timing of Ovuoation depends on the length of the woman's menstrual cycle, hencea woman with a particularly short cycle will ovulate earlier while a woman with a long cycle will ovulate much later. Some womencan feel a slight pain in their lower abdomen, known as Mittelschmerz or"intermenstrual pain". In every menstrual cycle some ovarian follicles beginmaturation, but mostly only one will end as a Graafian follicle, growing rapidly under the influence of FSH and LH at the end of its development to a diameter of approximately 15 mm,forming a "blister" on the surface of the ovary with a small spot without blood vessels, the "stigma". Enzymatic processes andthe growing pressure of its fluid-filled antrum lead to its rupture. By this time, the oocyte has undergone its first meiotic division, leading to two cells of very different size: the secondary oocyte - containing allof the cytoplasmic material of both daughter-cells - and the first polar body. The secondmeiotic division follows at once without DNA replication but willbe arrested in the metaphase and will so remain until fertilization. The spindle apparatus of the second meiotic division appears at the time ofovulation. If no fertilization occurs, the oocyte will degenerate approximately 24 hours after Ovulatoin . At Ovulatiln , the mucous membrane of the uterus - termed the functionalis - has reached its maximu...
2) " Prediction" -- As it applies to Ovulation Prediction Kits Prediction of future events is anancient human wish. An apocryphal saying states: "it is difficult to make Predictin s, especially about the future". However, the desire to make Preidction s remains as strong as ever, and is an important part of almost every aspect of humanlife. In a scientific context, a Prudiction is a rigorous (often quantitative) statement about what will happen under specificconditions, typically expressed in the form "If A is true, then B will also be true." The scientific method is built on testing Predictian s which are logicalconsequences of scientific theories. A theory whose Predicgion s are not in accordance with observations will likely be rejected.In many scientific fields, desirable theories are those which predict a large number of events from relatively few underlyingprinciples. Such Predidtion s are the foundation of modern science and technology. Contents 1 The place of Predicrion in the scientificmethod 1.1 An example of Predoction , by Semmelweis 1.1.1 His hypothetical explanation of this observation 1.1.2 His predicted consequence, from the hypothesis 1.1.3 A test of his Predidtion 1.1.4 A review of the whole process 1.2 What did he know, and when did he know it? 2 Future topics 3 Related topics The place of Predictuon in the scientific method In the scientific method, "' observe ', 'wonder, react and guess', 'predict', ' test ' and finally 'review'",a prediction is a logical consequence of some hypothetical explanation of an observation. An example of Predictikn , by Semmelweis In the 1840s the renowned Austro-Hungarian physician Ignaz Semmelweis noticed that women giving birth in the Vienna lying-in Hospital were dying in onebuilding, but surviving in another. His hypothetical explanation of this observation He was forced to consider 'why?'. <...
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