Doctor insights on:
Are Twins Hereditary
Yes and no: Some multiple births occur naturally at approximately the rate of: twins: 1/89 (about 1.1%) of singleton births. North american dizygotic twinning occurs about 1:83 conceptions, and triplets about 1: 8000 conceptions. In the us, there were over 136, 000 multiple human births in 2003. A traditional approximation of the incidence of twins is 1:80. The incidence increased lately due to ivf & iui. ...Read moreSee 1 more doctor answer
Yes: Alzheimer disease exhibits multifactorial determination with many genes plus environment determining who will be affected. Twins and siblings have a slightly higher risk unless it is a rare case where single gene mutations are involved. These families exhibit early onset of alzheimer and relatives of affected persons have from 25-50% risk (see http://www.Mayoclinic.Com/health/alzheimers-genes/az. ...Read moreSee 1 more doctor answer
If you have identical twins, will they both develop the same genetic/inherited disease at the same point?
Depends: If it's something that fully expresses itself with no modification (such as huntington's), yes. If it's going to express itself but is lifestyle-modifiable (type ii diabetes), timing will differ. The diseases for which there's a genetic component (diabetes, lupus, multiple sclerosis, many others) have only one twin affected more often than not -- you can find details. ...Read more
Depends on location: For women in north america fortunate enough to have ultrasound imaging provided, most will know about multiple fetuses before they are born. In some other parts of the world, they may need to rely on their size or perhaps number of bony parts protruding. Often, if no ultrasound has been performed, delivery of a baby smaller than expected, based on size of abdomen, is an indication to look for more. ...Read moreSee 1 more doctor answer
None: There are no medications that are used specifically to promote twins. Multiples are far more risky. About 2% of pregnancies (not involving infertility treatments) result in multiple gestations - almost all of them are twins - triplets occur about once in 10, 000 pregnancies. The chance of twins is much greater when on fertility drugs or with other assisted reproductive treatments such as ivf. ...Read moreSee 2 more doctor answers
Early ultrasound: An ultrasound performed in the first trimester can confirm twins. Sometimes when twins are diagnosed very early, one of the twins may not survive and then the pregnancy usually will proceed normally as a singleton. Blood levels of the pregnancy hormone are also higher than a singleton pregnancy. ...Read moreSee 1 more doctor answer
Fair: Fraternal twins (non-identical) occur when a woman releases more than one egg during ovulation and this trait can be genetic. Identical twins occur when a single fertilized egg splits into two and is not genetic. Fertility treatments also increase the rate of twins. So with that many sets of twins in the family there is a decent chance of you having twins too. ...Read moreSee 1 more doctor answer
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