ARPKD is one of the commonest inheritable infantile cystic renal diseases but is far less common than the autosomal dominant polycystic disease (ADPKD), which affects adults. The incidence is estimated at ~1:20,000-50,000 6,9. There is no perceived gender or racial predilection.
Why the female of the species is more bendy than the male. By DAVID DERBYSHIRE. Last updated at 12:25 13 December 2007. It has been obvious to anyone watching Strictly Come Dancing that women tend to be more flexible than men. For every supple Flavia Cacace, there's a slightly more stiff and awkward Gethin Jones. Now scientists think they know the answer why. A study suggests that females have a stronger and more bendy, lower back than males. Scroll down for more ... The differences evolved over millions of years to let expectant mothers stay mobile during pregnancy without the weight of a baby causing them to topple over.
Because all girls are different, the length of a period can vary from girl to girl. One girl might have a 3-day period while another girl has a 7-day period. It can take several years for a girl's period to become regular. One month the period might last 4 days, whereas the next month it might be 6 days.