Most sets of Twins 1707–c. 1782), a peasant from Shuya, Russia, gave birth to 16 sets of twins.
Some names for these are: Twins for 2 fetuses. Triplets for 3 fetuses. Quadruplets for 4 fetuses. Quintuplets for 5 fetuses.
What are 10 twins called? – Decuplets: a combination of 10 of a kind. In this case, babies! A South African woman has reportedly given birth to 10 babies at once, besting a world record set just last month.
Quintuplets are a set of five babies born in one birth. A baby that is part of such a set is called a quintuplet and sometimes referred to as a "quint."
Trisomy 13 (also known as Patau syndrome) - MN Dept. of Health.
Identical, or monozygotic (MZ), twins have 100 percent of their genes—including those that influence risk for alcoholism—in common, whereas fraternal, or dizygotic (DZ), twins share (on average) only 50 percent of the genes that vary in the population (see figure). Common Environmental Sources.
Sextuplet births are extremely rare
The Woman's Hospital said the odds of having sextuplets were estimated at one in 4.7 billion. Sextuplet births are extremely rare.
There are two types of twins – identical (monozygotic) and fraternal (dizygotic). To form identical twins, one fertilised egg (ovum) splits and develops two babies with exactly the same genetic information.
Naturally, twins occur in about one in 250 pregnancies, triplets in about one in 10,000 pregnancies, and quadruplets in about one in 700,000 pregnancies. The main factor that increases your chances of having a multiple pregnancy is the use of infertility treatment, but there are other factors.
Superfetation is a rare event that involves getting pregnant a second time while you're already pregnant. It's so uncommon that cases of superfetation often make headlines. Your body does a good job preventing subsequent pregnancies once an embryo is developing inside your uterus.
Monoamniotic-monochorionic Twins
This is the rarest type of twin, and it means a riskier pregnancy as the babies can get tangled in their own umbilical cords. If you have monoamniotic-monochorionic twins, your healthcare provider will monitor your pregnancy closely.
Some names for these are: Twins for 2 babies. Triplets for 3 babies. Quadruplets for 4 babies.
Septuplets (7)
The McCaughey septuplets (born 19 November 1997, in Des Moines, Iowa) are the world's first surviving set of septuplets.
The largest set of children to be born together and survive—not including this week's octuplets, who are all still alive—is seven. A set of septuplets born in Iowa in 1997 became the first to survive infancy. At least two more sets of septuplets have since been born and survived.
The world's only nonuplets - nine babies born at the same time - have safely returned home to Mali after spending the first 19 months of their lives in Morocco. The babies broke the Guinness World Record for the most children delivered in a single birth to survive.
The couple conceived quadruplets naturally, an extremely rare occurrence that happens in just 1 in 700,000 pregnancies. Approximately 90 percent of quadruplets are conceived with the assistance of medical technology.
In the US, 105 non-twin males are born for each 100 non-twin females. However, males are slightly more likely than females to die in the womb. And because the death rate in the womb is higher for twins than for singleton births, female twins are more common than male twins.
Fraternal twins don't share identical DNA and are no more genetically similar than any other siblings. They can be opposite sexes and can look completely different from each other.
Identical twins share the same genomes and are always of the same sex. In contrast, fraternal (dizygotic) twins result from the fertilization of two separate eggs with two different sperm during the same pregnancy. They share half of their genomes, just like any other siblings.
Identical twins are almost always the same sex, although there are some rare exceptions to this rule. Because identical twins occur when a single fertilized egg splits and forms two embryos, each embryo has the same chromosomes (usually, XX for girls or XY for boys). Remember that sex and gender are not the same.