Twin : Twins

The term twin referring to people refers to two individuals who have shared the same uterus (womb), usually born on the same day but not necessarily. There are two different kinds of twins: identical and fraternal.

Identical twins occur when a single egg is fertilized and then divides into two separate embryos. The two embryos develop into fetuses sharing the same womb, and generally the same amnion. These twins are identical genetically unless there has been a mutation in development, and are necessarily the same gender.

Fraternal twins occur when two eggs are released by the mother at the same time, within the same menstrual cycle, or within one menstrual cycle of each other. These twins are no more similar genetically than any siblings and develop in separate amnions, with separate placentae. They may be of mixed gender or the same gender.

Twin studies refers to the practice of assessing identical twins for medical, genetic, or psychological studies to try to find innate similarities and differences. Twins that have been separated early in life and raised in separate households are the most sought-after for these studies.

Sometimes multiple births may involve more than two fetuses. If there are three, they are called triplets; four, quadruplets; five, quintuplets; six, sextuplets, seven, septuplets, and so on. Historically, triplets have been quite rare and more than triplets so rare as to be almost unheard of. However, modern fertility drugs often stimulate release of multiple eggs by the mother, sometimes resulting in multiple fetuses.

Common misspelling and questions (FAQ)

wins  tins  twns  twis  twin  wtins  tiwns  twnis  twisn  twin  ttwins  twwins  twiins  twinns  twinss  5wins  rwins  fwins  6wins  gwins  6wins  ywins  gwins  t2ins  tqins  tains  t3ins  tsins  t3ins  teins  tsins  tw8ns  twuns  twjns  tw9ns  twkns  tw9ns  twons  twkns  twihs  twibs  twijs  twijs  twims  twinw  twina  twinz  twine  twinx  twine  twind  twinx  twyns  ywins  tywins  twines 


Hart will answer or forward your message. We would prefer to send you information by email. (Three Pages) ***START**THE SMALL PRINT!**FOR PUBLIC DOMAIN EBOOKS**START*** They tell us you might sue us if there is something wrong with someone other than us, and even if what's wrong is not our disclaims most of our liability to you. It also tells you how By using or reading any part of this PROJECT GUTENBERG-tm this "Small Print!" statement. If you do not, you can receive sending a request within 30 days of receiving it to the person medium (such as a disk), you must return it with your.