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Any counting of days regarding menstruation or fertility is always from the first day of your period - LMP is the day you started your last period, fertility window is from LMP - to days 9 thru 16 - the average cycle is 28 to 34 days beginning with LMP.

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Q: Do you count the last or first day of your last period?
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Do you count the first day of your last period to see how many days you are late?

Yes. From the first day of the last period you had - count forward 28 days (or when you expected to start). Day 29 would be 1 day late.


Do you start your 28 day count from the first day of a period?

You start counting on the first day of your period.


When you calculate how far along you are in pregnancy do you count week one as the start of your period?

To calculate an estimated due date you should count from the very first day (the day you started bleeding) of your last menstrual period.


When you start your period if you have brown old blood first do you count those days as your 28 days or do you start counting when the blood is red?

When you start your period if you have brown, old blood first you count those days as the first day of your 28 day menstrual cycle. You do not have to start counting day one when the blood is red.


When is day one of your cycle?

Day one of the menstrual cycle is THE DAY YOU START BLEEDING, THE DAY YOU START GETTING YOUR MENSTRUAL FLOW. This is the day you start counting your cycle, until you get the first day of the next period, this is, that is the fist day of that new cycle. DO NOT start counting from the last day of your period, that is a common mistake. It is important when you visit a physician to know when was your last menstrual period, so try and keep record of it in some form of agenda or excel page. When a doctor asks, "when was your last menstrual period?" he or she will count on you to remember this date, it is important health information and you should be responsible to remember it. He or she are expecting to hear the date of the FIRST DAY of your last, and therefore, most recent menstrual period. I'm a general physician, so, I'm telling you, for us, this is important.

Related questions

Do you count the first day of your last period to see how many days you are late?

Yes. From the first day of the last period you had - count forward 28 days (or when you expected to start). Day 29 would be 1 day late.


Is your next period 4 weeks from the start or 4 weeks from the end of your last period?

From the start. You count the first day of bleeding "day 1".


Do you start your 28 day count from the first day of a period?

You start counting on the first day of your period.


When you calculate how far along you are in pregnancy do you count week one as the start of your period?

To calculate an estimated due date you should count from the very first day (the day you started bleeding) of your last menstrual period.


If you count your cycle from the day it starts when do you stop counting?

Count from the 1st day of your "Actual" Period From the first day of your last period until your next period, depending on how long your cycle length is. (for example, if your cycle length is 28 days, then the time you start to ovulate is around day 14. but every woman is different). For example, if ur period starts on June 1, then that's Day 1 of ur cycle. The first day of your period is the first day of bleeding, which is the first day of your cycle.


Does implantation counted to pregnancy weeks?

Yes, you actually count from the first day you started your last period. Google due date calculators and enter in the first day of your last period. That will give you a due date. Good luck! -K


Do you count your cycle from the first day you bleed?

Every woman's cycle starts on the first day of their menstruation. First day of menstruation is usually cycle day one. So start counting on that day and they end it the day before your next period will arrive. So if you have a 29 day cycle that would mean that you have 29 days before your next cycle will come.


How long until you get youre period after you finished youre period?

A cycle lasts 28 days so count 28 days from the first day of your last period


When does the mateing period for dogs begin and end?

The mateing period begins with the first site of blood. Then count 10 days from the day you see the blood and you and breed the dog. The period last 14 day .


You do not know when im due on do you count from the day you finished your last period if so how many days?

most women have a 28 day cycle, you count from Day One when you start your period to get the date for your next period


How do you count day of fertility?

you do not count the day you had sex, it goes by the day of your last period, or menstrual cycle. then 38 weeks later you give birth


Do you count 28 days from when your period ends or starts?

Menstrual cycles usually recur 28 days from the first day of your last period (meaning the "start" of your period).