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 superstar at that place is an average of some four million passel born e very twelvemonth (http://www.cdc.gov/nchs/releases/02 refreshfuls/womenbirths.html). In a convention maternalism the human embryo goes through and through a very complicated process. During the nine months of pregnancy the embryo develops all the canonic things, such as the heart, liver, and brain, that it take to live in the remote world. A nine-month pregnancy is divided, by doctors, into trinity trimesters of equal length. During severally trimester the baby goes through different developments and continues to grow. The low gear trimester is considered the date 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 overstretch up stakes ovulate about 400 times . To see a baby, the womans dustal cell must be fertilized at bottom 24 hours of when it was released. This, however, does not soaked the woman has to have intimate intercourse the day the ovum is released. Sperm fuel break several days wrong the woman, so having intercourse even out 4-5 days before ovulation can cause conception (Nilsson 31). fertilization is the moment hotshot spermatozoon cell penetrates the ovum.

At that akin 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. every(prenominal) effeminate egg contains one X chro mosome. Every sperm either contains one X o! r 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 send on it can not change. All of the time there is 50%... If you want to get a rich essay, enunciate it on our website: OrderEssay.net

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