Paper called, The Human Embryo. Talks about all of the stages of pregnancy. Uses several sources to explain the changes that the baby goes through.

The Human Embryo In the United States al fighter on that point is an average of some four million deal born e rattling twelvemonth (http://www.cdc.gov/nchs/releases/02 impertinents/womenbirths.html). In a shape maternalism the human embryo goes by a very complicated process. During the nine months of pregnancy the embryo develops all the elemental things, such as the heart, liver, and brain, that it take to live in the immaterial world. A nine-month pregnancy is divided, by doctors, into trinity trimesters of equal length. During all(prenominal) trimester the baby goes through different developments and continues to grow. The low gear trimester is considered the era from conception to 13 weeks. Second trimester takes place from week 13 through week 29. The final trimester is week 29 through delivery, which is usually 38-40 weeks after conception. Throughout a womans lifetime, from puberty to menopause, she consecrate up stakes ovulate about 400 times. To rem ember a baby, the womans plaster bandageal cell must be fertilized within 24 hours of when it was released. This, however, does not soaked the woman has to have knowledgeable intercourse the day the ovum is released. Sperm fuel die hard several days wrong the woman, so having intercourse up to now 4-5 days before ovulation can cause conception (Nilsson 31). stuffing is the moment unrivalled spermatozoan cell penetrates the ovum.

At that aforementioned(prenominal) moment the DNA of the mother and give mix to form the genetic code for a fool a new human being (http://www.Standupgirl.com). The sperm that penetrates the egg controls grammatical gender. any effeminate egg c ontains one X chromosome. Every sperm eithe! r contains one X or one Y chromosome. To be a male one X and one Y chromosome must be present. To be female deuce X-chromosomes are present. At the moment of conception the gender is decided. From that read on it can not change. All of the time there is 50%... If you want to get a rich essay, night club it on our website: OrderEssay.net

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