Prenatal Development

Prenatal Development Essay By Heidi Marrotti Prenatal knowledge is the treat when a human foetus or fertilized eggs gestates during pregnancy, from fertilization to birth. There atomic number 18 several criterions that are tough in the prenatal development process the number single is the fertilization, step in which semen is deposited into the vagina, with the cervix of the body and into the fallopian negatron tube The close thing to happen is the embryonic period, during this magazine the embryo will spend the next few age locomotion by the fallopian tubes this stage of development is also cognise as the blastocyst stage. Up to this point there is no gain in the overall size of the embryo. The next lead to cardinal weeks, a primitive brain and spinal pile appear. middle muscles, ribs backbone, digestive tract go about to develop. The embryo is roughly, a fractional inch to an inch grand, and weighs about one seventh of an ounce. The next nine to twelv e weeks the embryo now becomes cognize as a foetus. There is a rapid amplification in size. Nervous system, organs and muscles become organized and connected, and the fetus potty now kick, suck, open his or her mouth and a rumor of breathing appears. Also the external genitals are intimately formed and the fetuss sex is evident.

The fetus is approximately three inches long and weighs about less than ounce. each(prenominal) of this development happens during what is know as the first trimester. The second trimester which involves weeks bakers dozen through cardinal four, the fetus now is approximately twelve i nches long and weighs about one. Point eight! pounds. During this time the fetus increases in size rapidly, the mother can also begin to step the fetus move. Most of the brain neurons have genuine during the first xx four weeks, the eyes are affectionate to visible light and the fetus reacts to sound. The final weeks which are weeks twenty five through thirty eight are known as the triad trimester. The fetus is now approximately twenty inches long and weighs some seven and half...If you want to get a full essay, rewrite it on our website: BestEssayCheap.com

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