Twin

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.

Statistics

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 (production team)

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.

Production and songwriting discography

2001

Charlotte Perrelli - Miss Jealousy

2002

Amber - Naked

Da Buzz - Wanna Be with Me

Gloria Gaynor - I Wish You Love

2003

No Angels - Pure

Sophie Monk - Calendar Girl

Play - Replay

Snap! - The Cult of Snap!

S Club 8 - Sundown

Belinda - Belinda

2004

American Juniors - American Juniors

Die Schlümpfe - The Smurfs

Charlotte Perrelli - Gone Too Long

Sandy Mölling - Unexpected

Twin (disambiguation)

A twin is one of two offspring produced in the same pregnancy.

Twin may also refer to:

See also