How To Calculate Ovulation Date With Longer Periods?
Thanks for the query.
Usually in menstrual cycle the period of second phase which is called luteal phase means from ovulation to menstruation is more or less constant.
This will be around 14 to 16 days.
As with progression of the age the length of menstrual cycle can alter due to the hormonal fluctuation. But in case of ovulatory cycle the luteal phase will usually remain constant.
So according to this 12th to 20th day can be taken as safe period.
But as sometimes menstrual cycle can undergo fluctuation better to use some precaution or track the ovulation with ovulation kit and plan accordingly.
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I mentioned 12th to 20th day because you asked about 7 to 15 days after periods.
If the periods complete in 5 days, 7 days after period is 12th day of menstrual cycle and 15 days after period is 20th day.
So in case of 45 days cycle ovulation can occur approximately in between 29th to 31st day (14 to 16 days before menstruation).
According to that in a menstrual cycle of 45 days:
1st to 24th day and 37th to 45th day are safe periods.
25th to 36th day is fertile period approximately.
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