put simply, what you saw in 28 days later applied to women, they enter a state of perpetual intense rage and begin spewing blood while attempting to rip shreds out of the uninfected (the men). luckily it does not contaminate on contact.
period infection stage -
man: you know <woman>.. its such a nice night..
woman: $!&~%!!!!
man: holy-
"ahhhhhgtklhky!!!" *tear, rip, bite...gargle*
.....*angry breathing*...
The menstruation cycle happens once a month every 27-30 days. Tiny cells that get fertilized when you are pregnant, come out of your body in a blood like form because when they enter your uterus they collect a lot of blood and then leave the body. This occurs because the body produces eggs so you can get pregnant, but when they are not being used they leave the body, therefore you get your period once a month. Some girls can get their period from age 9-18. Side-effects include; bloating, cramps, fatigue, vomitting, and others.
I got my period this morning, and my stomache kills like fuck.
When a woman sheds her uteras lining. Starts as early in soem girls as age 8 and as late as age 18. Happens about ever 28 days, could be more or less. Happens for 5-7 days. Could be less (lucky!) or more.
Basically when blood comes out of a womans vagina. Creates cramps and bloating.