HOW DOES TWIN PREGNANCY OCCUR ?
Twin pregnancy is if a pregnancy consists of two foetus or more. Commonly it caused by several retarder in the beginning of zigot fission. The case of twin pregnancy that most often found is dizygotic twin or fraternal twins. This twin is caused by the discharging of two ovum simultaneously so both are fertilized by two different spermatozoid. This causes the genetic composition of both zygot becomes different
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