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Although pregnancy is seen in an average of 80-100 twin pregnancy often vary between communities and races. Less common in for example Japanese, it is highly Nigeria.
the twin-triplet pregnancies are more common in the Who?
- Some breeds are more frequent (about 5% in Nigeria)
- Pregnancies that occur in older age (peaking at 37 years of age): At this age it is difficult to conceive than younger women but that is more than the rate of pregnancy when most thick.
- Twins increases the chance of pregnancy if the mother's family history (valid for dizygotic twins)
- It does not affect the father's family to be twins.
- Multiparity
- In countries more exposed to sunlight in summer
- Tall and overweight women
- Clomiphene citrate (about 10%) or gonadotropin therapy in pregnant women with the rest (20-30%)
- Monozygotic twins (monozygotic) twins are not affected by any chance occurred factor in markets around the world at a certain rate is fixed (1/250) is only increasing rates of IVF.
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