yes a normal period can be 3-5 day or longer :) x
It could be ovulation or your period coming back. It's usually not normal for a few months after.
No
Because ovulating is a sign that you're about to start your period. I'm 13, I ovulate and I haven't gotten my period. Don't worry, it'll come soon. :D
If you have a normal period with normal flow you are not pregnant
This is normal. Women usually get cramps during ovulation and ovulation occurs a few weeks before your period
mainly if ur pregnant but other things can cause that too, like stress
When a dog has their "period", it is called a heat cycle. Bigger breed dogs, such as a Golden Retriever, usually do not have their first heat cycle under 12 months of age. Though 16 months old is not common, some Goldens can wait until 18 months before having their first one. Here is an article about Golden Retriever's and their heat cycle: http://www.all-about-goldens.com/canine-heat-cycle.html
Everyone is different, and sometimes girls may skip a month. If you recently started your period or in this case your period was 4 months ago and it was your first time, that is normal. From my first to second period ever, I went 2 months. Again, everyone is different, and if it reaches 6 months of not having it, I would maybe consider going to the doctor.
Not if she had been having (fairly) regular menses before. See a health care professional about your concerns.
having period cramps for the first 3-4 months are normal. if you are spotting or see any blood go to the doctors . i had cramps for the first 4 months until they finally went away
No; having a normal period is a sign that everything is... normal. If your period is longer than usual, heavier than usual or abnormal in some way, than you should consider consulting a doctor.
Humans have an average gestation period (time of pregnancy) of 280 days.