I could be wrong, but I think that the genetic factor is applicable only to the mother of fraternal twins. That is, the mother has to release two eggs at approximately the same time. No matter how high the father's sperm count is, there have to be two eggs.
For identical twins, of course, there is a single egg that divides. I don't know anything about medicine, but when I was in high school (many, many years ago) I wrote a term paper on multiple births for my biology class. I had twin cousins, and I was fascinated with the subject. If anyone in the group has a medical background, please feel free to confirm or correct. Nancy From: [email protected] Date: Wed, 16 Jun 2010 13:48:58 -0400 Subject: Re: [AZORES-Genealogy] Twins To: [email protected] My gg grandfather, Thomaz Jose da Silveira was a twin. He & his brother, Domingo were baptized in the Calheta do Nesquim parish on Pico, on 20 July 1866. He had a grandson that fathered twins, a boy & a girl, in 1938, in Washington, D.C. Sherry -- To unsubscribe from this group, send email to [email protected]. Follow the confirmation directions when they arrive. For more options, such as changing to List, Digest, Abridged, or No Mail (vacation) mode, log into your Google account and visit this group at http://groups.google.com/group/Azores. Click in the blue area on the right that says "Join this group" and it will take you to "Edit my membership." _________________________________________________________________ Hotmail has tools for the New Busy. Search, chat and e-mail from your inbox. http://www.windowslive.com/campaign/thenewbusy?ocid=PID28326::T:WLMTAGL:ON:WL:en-US:WM_HMP:042010_1 -- To unsubscribe from this group, send email to [email protected]. Follow the confirmation directions when they arrive. For more options, such as changing to List, Digest, Abridged, or No Mail (vacation) mode, log into your Google account and visit this group at http://groups.google.com/group/Azores. Click in the blue area on the right that says "Join this group" and it will take you to "Edit my membership."
