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

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Q: Is your next period 4 weeks from the start or 4 weeks from the end of your last period?
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Related questions

If someone stopped taking birth control pills after her last period how late could her next period be?

Period can arrive anytime after the withdrawal bleed from 4 weeks to 8 weeks. Its different in every woman.


Do you start counting when your next period is from the day you started or the day you ended your last period?

from the day it ended.


You started your period on January 22 when will you have your next period?

Around Feb 19, Its usually 4 weeks after the first day you start.


How long does it take to start a normal period after misscarring?

Typically you'll get the next period in 4-6 weeks after a first trimester miscarriage.


What if you have been off the pill for three weeks and want to start again?

To start the pill again you take it on the first day of your next period.


If you start the pill on the first day of your period when you have finished that pack do you immediately start the next one?

If you have finished with the pills and the faux pills, had your period, then you start the new set of pills after the last day of your period.


When you have your first period when will you get your next period How long is it before you get your next period?

well the first couple years is irregular so when you first start you period it can last up to 3-15 days at the most. and about 24-28 days until your next period(:


My last period was on the 1st of December 2009 when should my next period be?

If my last period was on the first of December when is my next period due?


What is the cycle of pregnancy?

pregnancy is dated 40 weeks from the date of your last period. The first day of your last period counted as day one. You usually conceive during the middle of your cycle so when you find out you are pregnant, usually when you miss you next period you are said to be 4 weeks pregnant but the fetus is only actually 2 weeks old.


How many days after periods you can identify pregnancy?

Pregnancy can be confirmed about 4 weeks after the first day of your LMP (last period) or about the time your next period is due to begin.


If you don't know when your next period is when should a pregnancy test be taken?

by 3 weeks after the last time you had sex a test will be acurate.


How do work out your ovulation time?

It's roughly 2 weeks after your last period finished up until your next one starts