### person | relative | sibling:

Twin
* Most twins have bonds
  - differences
* Most twins have different fingerprint patterns
  - fathers
  - life
  - special bonds
* Most twins raise in different environments
  - share identical patterns
  - weigh pounds
* Some twins can have conditions.
* Some twins have diabetes
  - different disease status
  - godparents
  - marry other twins because they know what it is like to have a twin
  - produce a great deal of alpha, causing their spectra to have a peak
  - require blood type or DNA testing after delivery to determine if they are identical
  - vary in height
* are a genuine rarity, and only a few births of three or more foals have ever been recorded
  - rare occurrence
  - also more likely to be left-handed than singletons
  - always of the same sex
  - at a marked increased risk for becoming concordant, suggesting a strong genetic component
  - bands
  - capable of complete sentences
* are common enough to have inspired myths in every culture
  - in good habitat, and triplets have been documented
  - common, which the mother can easily raise, and often there are triplets
  - complex machines
  - crystal
  - different persons with distinct bodies and souls and personalities
* are extremely rare, but have been known to occur
  - frequent in adult ewes and most people are successfully breeding their ewe lambs
  - in essence clones as they share the same genetic blueprint
* are more common with urials than with some other sheep species
  - likely to occur in larger families as well
* are most common in African-American women
  - commonly of similar age and single lineage
  - natural clones
  - part of snakes
* are rare but do occur occassionally
  - in the wild
  - rare, although they have been reported
  - relatively rare
  - slightly more common when pregnancy is assisted with clomiphene
  - the most natural human clone known to man
* are the norm for healthy adult cows
  - older does, while young does usually give birth to a single fawn
  - together in the womb
* are very common among lorises
  - and often there are triplets and quadruplets
* attached at the head occur only once in two million births.
* bridge the gap between the world of the gods and the world of humans.
* can also form after a crystal has grown.
* can be clones
  - identical, if they result from the division of one fertilized egg
  - have either one placenta, which is most common, although they can have two
* carry substantially more risk than a normal pregnancy.
* communicate, touch, and even caress each other in the womb.
* fascinate people, especially if they are identical.
* have a higher risk of complications and premature birth
  - legs
  - necks
  - nuclei
  - sections
* interact with each other in the womb.
* make trips.
* need nutrients.
* never survive in the wild as the mothers only have room for one baby to ride on their backs.
* often appear to consist of two or more individual crystals symmetrically united.
* result when a mare ovulates and conceives on two follicles during a heat cycle.
* seem to be born more frequently in captivity, when artificial insemination is used.
* share habitats
* show patterns.
* to share life stories

### person | relative | sibling | twin:

Dizygotic twin
* develop from the same fertilized egg.
* form when two separate eggs are fertilized by separate sperm.
* result when two separate eggs are fertilized.