The purpose of separating these twin telescopes at birth, as it were, is to provide identical instruments to astronomers who need to make exactly comparable observations in both hemispheres.
Federer's wife gave birth to twin daughters last month, shortly after his record 15th grand slam triumph.
Federer has also adapted to life as a father, after his wife Mirka gave birth to twin girls in 2009, although his daughters are still too young to fully appreciate who their father is.
Armstrong, 30, whose victory in last year's Tour was his most comprehensive yet, says the birth of his twin daughters last November has given him further motivation.
He was accused of murdering by neglect one of newborn twin boys his daughter gave birth to in 1996, having failed to arrange medical care for the ailing infant.
Demus, the 2005 world silver medallist who missed the 2007 worlds for the birth of her twin sons, just managed to stave off the late challenge of Lucas and admitted she was to blame for her defeat.
His mother and twin sister had died during his birth and he and his seven surviving siblings had been brought up on a farm by relations.
According to the Sunday Mirror, Maria Jones-Elliott, from Waterford in Ireland, went into labour four months early, giving birth to the first twin, Amy, with the second, Kate, arriving three months later.
The drug is not intended for use in women with a multiple pregnancy, such as a twin pregnancy, or other risk factors for preterm birth.
Tommy's says there are a number of risk factors which may lead to premature birth including maternal smoking, infections in the womb, twin or triplet pregnancies.
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