Human Twins

Geoff Collins gcollins at
Tue Apr 5 13:08:18 EST 1994

	I am looking for some information on the likelihood of parents
producing twins if both parents are siblings of twins.  The specific
information relates to families where first or second born children
are not twins, but third pregnancy results in twins.  If both families
are like this, and the first of second born from a family like this marries
the first or second born from another similar family, what is the likelihood
that they will produce twins from first, second or third conception?

Send information and/or sources to gcollins at

Geoff Collins
Ryerson Polytechnic University
Toronto, Ontario

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