does your next period start 28 days after the first day of your last period?
538926
It's supposed to start around 28 days after the first day of your last period.
608879
3 1/2 weeks since? Thats only 24-25 days... most people's cycle is 28 days... ? \n\nAre you experiencing any pregnancy symptoms?\n\nIt doesn't sound like you are... your period (depending on your cycle) should be coming within the next week.
309544
If your period is due next week, you should be fine.  You should be past your ovulation phase.  Since you had sex today, you should be fine.
1011035
1 wk after her period would be pretty safe. A woman usally ovulates 14 days after the first day of her last period.
818890
you are getting unnecessarily worried because 2-5 days variation in the periods is not important. cycle is considered normal when periods take place between 21-35 days and last for 3-5 days. If you are not having any Other medical problem and not taking any drug, there is nothing to worry.
633650
Yes, depending on what you mean by "after my period"  Ovulation usually happens 14 days after a woman starts bleeding, and it can be fertilized at any point thereafter for about 4 days.  It doesn't implant in your uterus for about a week after fertilization though.
486303
It sounds pretty normal.  Just keep track and if it doesn't get better go to the doctor.\n\nThe normal menstrual cycle in humans\nWomen show considerable variation in the lengths of their menstrual cycles, and the length of the menstrual cycle differs in different animals (see below).\n\nWhile cycle length may vary, 28 days is generally taken as representative of the average ovulatory cycle in women. Convention uses the onset of menstrual bleeding to mark the beginning of the cycle, so the first day of bleeding is called "Cycle Day one".
379738
Until the first day you get your period,there is a ten days time that is not risky to get pregnant.If your period takes like 5 days,then you might not get pregnant for 5 days more.It's like that.
736875
It depends on how long your cycle is. In a normal 28 days cycle, ovulation is on cycle day 14. You can conceive if you have sex on cycle day 13,14,15, or 16. If your cycle is longer or shorter, ovulation is later or earlier. Ovulation is always fourteen days prior to the first day of your next period
79981
It depends on when ovulation occurs during your cycle.  Everyone is different.  One week after menstruation typically wouldn't be safe- a week before menstruation would really depend on when you ovulate.
713903
Not usually. On average, women ovulate about 14 days after the start of their period, when on a 28 day cycle that is regular. However, it is not an absolute fact that it works that way for everyone. They say to use birth control (non-hormonal types anyway) even during your period because there still exists the possibility of conception, which of course, requires ovulation. I would think that if the cycle is not regular to begin with, that would increase the odds of that happening.
1162942
No. Periods have their natural course. They come and then they go. Don't worry, you enver know how long it will last because periods last 3 to 5 days depending on if your stressed out or really healthy, or just recently gained weight.
881542
Very likely, it is perfectly normal. There is a lot of variation in how often women have their periods, the average, however,  is about 28 days.\nBut you should still visit a gynecologist as he may order some simple blood tests (hormone levels) and an ultrasound (totally painless 5 min test) just to make very sure.
301882
The average time between cycles is 28 to 31 days so about 4 weeks.  I always get more lubrication about the time I start ovulating, which is 2 weeks before my period begins.  I get less lubrication the 2 weeks after I end my period.  But every woman is different so it may not be the case for everybody.
925898
your period should come every 28 days depending on how many days in the month you could get 2 but not every month or u may need a d&c
558487
It's not always exactly every 30 days.  It could be 33 or 35, especially at first.  Don't worry unless you think you're pregnant.  Talk to your mom about it or sister or older friend.
1169485
It's perfectly normal - especially in your teenage years as the body is constantly changing.  Moods, stress, weight, and even eating habits all play a role in when you get your period.\n\nMost women do not have a 28 cycle - some have a 21 day cycle and others have a 32 day cycle.  Every woman is different.\n\nSo relax - don't worry about the timing of your period being off.  Find an average of how many days it takes to get it after the day you expect it on is.  You'll feel better knowing your own cycle.