Twins are two offspring produced by the same pregnancy. Twins can either be monozygotic ("identical"), meaning that they can develop from just one zygote that will then split and form two embryos, or dizygotic ("fraternal"), meaning that they can develop from two different eggs; each are fertilized by separate sperm cells.
In contrast, a fetus which develops alone in the womb is called a singleton, and the general term for one offspring of a multiple birth is multiple.
The twin birth rate in the United States rose 76% from 1980 through 2009, from 18.9 to 33.3 per 1,000 births. The Yoruba have the highest rate of twinning in the world, at 45–50 twin sets (or 90–100 twins) per 1,000 live births, possibly because of high consumption of a specific type of yam containing a natural phytoestrogen which may stimulate the ovaries to release an egg from each side.
In Central Africa there are 18–30 twin sets (or 36–60 twins) per 1,000 live births. In Latin America, South Asia, and Southeast Asia, the lowest rates are found; only 6 to 9 twin sets per 1,000 live births. North America and Europe have intermediate rates of 9 to 16 twin sets per 1,000 live births.
Twin (sometimes written as TWIN) is a Swedish record production and songwriting team, consisting of Niclas Molinder and Joacim Persson, who are working in the genres of pop, R&B and rock.
A twin is one of two offspring produced in the same pregnancy.
Twin may also refer to:
Open the gate to a new level
Zero point starts 2008
My friend is me he has my genius
What is to come for us
We have the same girl
Scientists duplicate me
3, 4 or 100 times
Fear or pleasure
No feeling for risk, no overview
No time, no return
The history comes through our future
Comes through my genetic code
She loves me and everybody gives her my seed
Is there a sense?
Now it makes me sick