What are the odds or chances of having twins?

The chances of having twins in 2003 was 3.1% or 1 in 32. The odds of having twins naturally was 2.11% or 1 in 47. The probability of having twins overall has risen drastically since 1980 when it was 1.89% or 1 in 53. So the chances of conceiving twins in 2003 rose 67% from 1980. This drastic increase in twin birth rate has been widely attributed to women waiting longer to...

What are the odds or chances of having twins?

The chances of having twins in 2003 was 3.1% or 1 in 32. The odds of having twins naturally was 2.11% or 1 in 47. The probability of having twins overall has risen drastically since 1980 when it was 1.89% or 1 in 53. So the chances of conceiving twins in 2003 rose 67% from 1980. This drastic increase in twin birth rate has been widely attributed to women waiting longer to conceive, the use of fertility drugs, and the use of in vitro fertilization(IVF).

A study done in the year 2000 estimated that approximately 67% of all twins were conceived without the use of IVF or fertility drugs such as Clomid.

The chance of having identical twins is approximately 1 in 250 or 0.4%. Historical twin statistics show that identical twins made up roughly 33% of all twin births. Currently only about 12% of all twin births are identical twins. The use of fertility drugs or in vitro fertilization does not increase the probability of having identical twins.

So what are some of the ways to increase the chances of having twins? As mentioned above, the use of fertility drugs can increase the odds of having twins to as high as 20% or 1 in 5. In vitro fertilization has a 25% chance of having twins or 1 in 4. In 1980, the majority(65%) of twins were conceived from a mother ages 20-29.

Year Births Twins Triplets or More
2003 4,089,950 128,665 7,663
2002 4,021,726 125,134 7,401
1997 3,880,894 104,137 6,737
1996 3,891,494 100,750 5,939
1995 3,899,589 96,736 4,973
1994 3,952,767 97,064 4,594
1993 4,000,240 96,445 4,168
1992 4,065,014 95,372 3,883
1991 4,110,907 94,779 3,346
1990 4,158,212 93,865 3,028
1989 4,040,958 90,118 2,798
1988 3,909,510 85,315 2,385
1987 3,809,394 81,778 2,139
1986 3,756,547 79,485 1,814
1985 3,760,561 77,102 1,925
1984 3,669,141 72,949 1,653
1983 3,638,933 72,287 1,575
1982 3,680,537 71,631 1,484
1981 3,629,238 70,049 1,385
1980 3,612,258 68,339 1,337

Source: US Census Bureau

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THE ODD BODY: Black and white twins: Brothers from the same mother

Stephan Gerth is German and white. His wife, Florence Addo-Gerth, is from ...

You have posted this question twice that I have already answered. However, I found this article to be interesting to you. You may want to incorporate it to your research (I believe that you're getting information).

THE ODD BODY: Black and white twins: Brothers from the same mother

Stephan Gerth is German and white. His wife, Florence Addo-Gerth, is from Ghana and has dark skin

The odds are one in a million, say doctors, but it can happen with fraternal twins due the genetic soup in our backgrounds. Peter Propping, former director of the Institute for Human Genetics at Bonn University, told Die Welt that the black mother may have had some white ancestors, or that the white father may have had black ones. Very occasionally, the roll of the DNA die may cause the baby of biracial parents to inherit only the genetic coding for one color.

Rare though they are, the German twins do have some company. In the past few years, at least three mixed race couples have welcomed twins who were also black and white.

In 2005, British couple Kylie Hodgson and Remi Horder, both born to mixed-race parents, had twin girls – one who is blond and fair-skinned and one who has dark coloring.
In 2006, Kerry Richardson, who is of Nigerian and English descent, and her partner, who is white, gave birth to twins who were both born light-skinned. But as they got older, one got darker while the other got lighter.
Natasha Knight, of Australia, welcomed a blue-eyed blond baby girl and her sister, who has brown hair, eyes and dark skin in 2006. Knight’s older daughter has blond hair, blue eyes and light olive skin. Knight is of Jamaican and English descent; the father is German.
In 1993, another set of black and white twins was born to the Dutch couple, Wilma and Willem Stuart, but it turned out to be a case of an in-vitro mix-up. The parents, who are both Caucasian, were mystified when the twins were born, but fell deeply in love with both of them. However, after about a year, genetic tests revealed that while one of the twins was biologically related to both parents, the other twin was not.

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