It’s pretty easy to  tell whether or not your cat’s in heat. The first sign is that they become overly affectionate.  They’ll rub their rear, head and neck against you and lots of other objects.  The tell tale sign is that your cat will produce a loud long howling sound. This is to let the male cats know that she is in heat and that she is ready to mate. The howling continues until she mates.  Your cat will also bend her body in a mating position with her rear raised and her tail in the air. She will tread around in the same place in this position. She’ll lift her tail and spray urine on various objects like walls, doors and furniture. The odor is much stronger that regular cat urine odor. This urine contains more estrogen and also lets other male cats know that she’s in heat.  If your cat displays these signs, then she’s in heat but don’t prepare that special place or cat bed for the new arrivals just yet. A cat is pregnant for about 65 days. Remember, your pets count!