The time around menstruation has been recognised as conferring
a susceptibility to several infectious diseases. Higher, clinically symptomatic
incidences of vulvovaginal candidiasis [1, 2] chlamydia trachomatis infections
, increased vaginal transmission of simian immunodeficiency virus 
have already been noted as related to a late luteal phase and menstruation.
The recurrent Herpes simplex type I infection belongs
to the perimenstrual...