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Genetics

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Twins

Family antecedents

The mother of my maternal grandmother has had 2 sets of twins.
The mother of my maternal grandfather has had 1 set of twins.
My mother has had 3 pregnancies, 0 of which were twins. My mother’s sister has had 4 pregnancies, 0 of which were twins.

General information

non-identical twins are caused by a double ovulation of the mother
so a male genetic parent carrying those genes wouldn’t increase the chances of non-identical twins for their children, but would for their grand-children (
source
⁠
)
2 third of twins are non-identical (
source
⁠
)
having identical twins doesn’t seem hereditary (whereas having non-identical twins is) (
source
⁠
)

Notes to self, to do

check if I’m carrier of those genes
check the number of twins is over how many pregnancies total

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