Every 28 days, unless of course she gets pregnant, then it's normally once a year.
Every 6 months.
Has she come on heat yet?
every six months. it all depends on the breed of dog .
For female animals, they go in heat about every 6 months.
No. Many dogs that go in to heat earlier are the ones that are bigger and can mature faster. The bigger breeds, such as a great dane or so, would go into heat much faster then a chihuahua for example. This si because the great dane can mature faster then the chihuahua.
Females come into heat every 21 days, plus or minus.
Yes, they come into heat but on an erratic cycle. They are only sterile because of the chromosomal difference between themselves and the available males. Occasionally female mules DO produce offspring. They still produce estrogen and ovulate. They just most often do not conceive.
Cats often come into heat every couple of weeks, with a gestation period of around 63 days. A Queen will often come back into heat when the kittens are weaned (around six to eight weeks). So, a female cat can have many, many litters during her lifetime.
Twice a year.
The best way to recognize when your female dog has her first heat cycle is to spot the drops of blood that will come from her rear. Her female parts will also appear swollen.
you have to wait for them to come into heat If the female is in heat she will eventually come around.
Normally a female (of any breed) will come into heat approximately every 6 months. It could be sooner if they are around another female in heat.