http://www.best-cat-tips.com/cat_pregnancy.htm...The Pregnancy
Feline pregnancy, or gestation, usually lasts 63-65 days. The length of the pregnancy, from ovulation to birth can vary between different breeds - anything between 58-70 days is considered within normal range. ...
... There are a number of signs to let you know when your queen is about to give birth.
Nesting
Decreased activity
Milk discharge from the nipples
Restlessness
Calling as if in heat
Licking of the vaginal area ...