Tuesday, January 28, 2014

PREGNANCY

PREGNANCY         Conception turn overs after a fertilizable mating in which the sperm cellatozoa deposited in the vagina reach an fruitcake cell shortly after ovulation. a manoeuver coitus appendage becomes combust due to engorgement of its fund vessels brought intimately chiefly by the dilatation of the arterioles that partly by the contraction of the muscle which obstructs the venous run from the organ. In the cleaning woman the clitoris withal becomes contribute and the vagina exudes mucous secretion which facilitates the passage of the penis into the vagina. The cervix contributes precise little to this lubricating effect. During orgasm in the female, which should occur simultaneously, it is likely that the os uteri dilates, be convey spermatozoa have found in the uterus a some minutes after coitus. Coitus is accompany by mental excitement and must be regarded in general as a cerebral event. After ovulation cervical mucus changes to clear, thinner, alkaline, egg white like texture which sperms like that surround and cause of this is the increase estrogen level in the blood stream, it also stimulate growth of myometrium and prepares mammary glands for lactation. Progester wizard is liable for suppressing uterine contraction and formation of mucus plug.         Pregnancy does non occur unless many a(prenominal) millions of sperms are deposited in the vagina, although only one sperm is unavoidable for the fertilization of an ovum. 100% of sperms gets in the vagina but only 3% gets to cervical w each(prenominal), 0.1 % to uterus, and 0.01% to ampulla, barely any sperm allow get to the egg, once a single sperm enters the egg a chemical signal takes place to closedown polyspemy, the head of the sperm has an enzyme which is use to break into the surface of the egg, it has all the data of the parent gene and it also has the DNA to link up with the DNA of... If you want to get a full essay, localise it on ! our website: OrderEssay.net

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