Holly+H.

=**Wiki Post # 1 - Genetics**=

**Twins:**

 * //If you are curious about how twins are formed and what process they go through prior to being born, you've come to the right place. There are three different kinds of twins, Fraternal twins, Identical Twins, and Conjoined Twins. Fraternal twins are formed when two eggs are fertilized, by two sperm, fraternal twins can be of the same or opposite sex, and visual similarity's are not necessarily needed. Identical twins are formed by one egg being fertilized and then being split into two halves, the two halves are genetically identical and most commonly of the same sex. Lastly conjoined twins are formed exactly like identical twins but during the process by which the egg splits it never fully separates, and the twins are formed attached to each other. They share organs which can sometimes lead to difficulty with trying to separate them.//**

This Is the process by which Identical Twins are formed.

This is the process by which Fraternal Twins are formed.

This shows the process by which Conjoined twins are formed.

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Complications Encountered:
With having twins there come a series of complications. One that is come across quite commonly with twins would be miscarriages, you are more likely to have a miscarriage while carrying twins as opposed to a single child. Other complications you could encounter might be high blood pressure, Pre-Eclampsia, you are more likely to have pre-eclampsia if you are 40 or over, if this is your first pregnancy, or if it has been 10 years since your last pregnancy.

Wiki post #2: Down Syndrome Down Syndrome is a genetic disorder that consists of a baby being born with an extra chromosome.  also called Trisomy 21. This happens at the time of conception. It is a developmental disorder that is a result of a extra copy of chromosome 21. It affects 1 in 800 to 1 in 1000 live born infants.  No one is really sure why this disorder occurs and there isn't real a way to prevent the chromosomal error that causes it. Scientists do know that women age 35 and older have a significantly higher risk of having a child with the condition. And woman over