sometimes it is because of stress. also it could mean you're pregnant.( remember you can only be pregnant if a penis went inside you and cummed.)
9 weeks
about 63 days or roughly 9 weeks for every litter.
Medication abortion can be performed safely up to 9 weeks gestation (i.e. 9 weeks after the first day of the last period).
The gestation period is 9 weeks, give or take a couple days.
40 weeks from the date of your last expected period - NOT 40 weeks from the time of conception!
The whole period takes about 9 months.
The gestation period for a cat is usually around 9 weeks =)
As with any breed, the average gestation period is 9 weeks.
You can skip your period for as long as you like (there is no maximum) or not at all, depending on your preferences.
All dogs have a gestation period of around 9 weeks.
Usually around 9 weeks, or 3 months.
You could be. Take a test