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Chances of fertility at 9dpo? Spotting at day 23 w/ intercourse
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Chances of fertility at 9dpo? Spotting at day 23 w/ intercourse

Last month I began my flow at day 27 shortly after intercourse.

This month, I believe I ovulated around day 15 of cycle.  No intercourse during this cycle, at all (husband out of town) until day 23 (9 dpo).  Shortly after incourse, I had bright red spotting.  Next morning, all evidence of spotting has disappered.

Background: Age 33. One abortion 17 years ago with no complications.  One miscarriage at 12 weeks 11 years ago.  Possibly one chemical pregnancy 4 months ago.  My cycle is extremely irregular.  For almost 20 years, it was a 30+ day cycle with only 2 1/2 to 3 days bleeding.  Long term use of oral contraceptive to control ovulation & menstrual migraines. Went off pill 17 months ago.  First 6 months, had regular cycles with little PMS or migraine.  Last 11 months, very irregular, sometimes as little as 20 days or as much as 30.  Significant PMS, cramps, heavy flow with large clots.  Flow lasts 4 to 5 days now.

Questions:

Is the onset of bleeding related to intercourse?  (Seems off two months in a row). Sometimes, it seems that intercourse brings my period early.

While 9 dpo puts me out of the "fertility window", how does each DPO calculate percentage wise to decrease in fertility?  

With such a truely irregular cycle, how can I better track fertility?
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The window of fertilization is probably not greater than 24h. There was a study several years ago showing that couples could get pregnant having had intercourse up to five days before ovulation, were most fertile two days prior to ovulation until the day of ovulation, but on the day after ovulation nobody got pregnant.

With irregular periods, it is very difficult to track fertility; probably your best bet is to use urine ovulation prediction testing but this can get expensive when your periods are so unpredictable.

Given your history of irregular periods, your 1 1/2 years off the pill, you should strongly consider visiting an infertility specialist for a full evaluation. You may benefit from a fertility drug such as clomid to regulate your ovulation, and the cause of your irregular periods and heavy periods should be determined.

Are your pap smears current? Most often bleeding after intercourse comes from contact with the cervix by the penis, rather than from within the uterus itself.
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