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How to Calculate Ovulation for Irregular Menstrual Period

on Nov 03, 2012

by Alyssia Granger

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How to Calculate Ovulation for Irregular Menstrual Period

Pinpointing when you ovulate is key to getting pregnant. Find out how to calculate ovulation for those that have irregular menstrual periods.

Calculating ovulation is a key part in getting pregnant. If you are actively trying to have a baby, you need to chart and track your cycles so you know when you are most likely to get pregnant. However, for a lot of women who have irregular periods, it can be a lot harder to chart your cycles and it can be really difficult to determine when the right time for you to get pregnant is. Something that most people don’t understand is that even if your periods are irregular, you can still be ovulating regularly. Today we are going to give you some tips on how to calculate ovulation for irregular menstrual periods. Claim Your 20 Free Pregnancy Tests – Click Here

Chart your cycle

First of all, you should try to chart your cycles on the calendar for a few months to see if you notice any patterns at all in the way that your cycles line up. Even if you don’t end up getting pregnant on your own, and need to see a fertility doctor, having a calendar with your cycles on it will really help your doctor to figure out what is going on with you.

Observe your cervical mucus

You can also keep track of your cervical mucus, although this is not the most reliable method and it can be a bit unpredictable. When your period ends, you will usually notice a few days with little to no cervical mucus at all. After that, your amount of cervical mucus will gradually begin to increase up to ovulation. When you are ovulating, your cervical mucus will be very much like egg whites, clear, stretchy and thick. The day that your cervical mucus is most like egg whites is the day of your ovulation. This is one reliable way to calculate ovulation, but it might take some getting used to.

Monitor your basal body temperature

Another way is by taking your basal body temperature daily. You can do this with a special BBT thermometer. You have to take your temperature every day, sometimes even for a couple of months before you notice a difference. When you are ovulating, your basal body temperature will rise by as much as a whole degree. While of course, this is a reliable way to determine when you are ovulating, it can really take some getting used to and is not as convenient as just using a calendar to track your ovulation based on your menstrual period. It is a good alternative way to determine your ovulation though, if your periods are irregular.

Use an ovulation prediction kit

You can also get a ovulation prediction kit over the counter at any drugstore for a good price, and you can use it to track your ovulation as well. These ovulation prediction kits are really easy to use and are much like a urine pregnancy test. If none of these methods work for you, you can always have your doctor do some simple blood tests for you to determine if you are ovulating or not. As you can see, there are ways to tell if you are ovulating even if you do have irregular periods.

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How to Calculate Ovulation for Irregular Menstrual Period, 3.6 out of 5 based on 11 ratings

Alyssia is mom to 2 giggley twin girls, Sophia and Emma, and son Hunter. She's a Southern girl, passionate about photography, travel and her husband Josh.

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  2. Physical Symptoms of Ovulation
  3. Signs of Ovulation: 5 Ovulating Symptoms
  4. Ovulation Symptoms: 9 Signs You’re Ovulating
  5. Getting Pregnant with Irregular Periods
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  • vanessaDLB

    My husband and I have been trying to get pregnant for the past year and half and have been unsuccessful before we got married I was using contraceptives such as pills and the depo shot and I going to have a hard time getting pregnant? Help!besides I’m irregular so I. Don’t know when I’m ovulating what should I do?

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  • VickyYoung

    I’m irregular, it would help me to get pregnant no matter if I’m irregular

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  • Unknown33101

    Ive try 3 to 5 times to get pregnet but i never do and i am only 18 i should be able to get pregnent right?

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  • naomi

    Iv been trying to get pergnant for 3 years and had no luck. i still have no clue when i ovulate cause my period is so iregular. I feel like I’m unabble to carry or produce. How do i find out if i am ovulating or abble to have a child?

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  • Dr. Christine Lee, MD

    You can still ovulate even if your menstrual cycle is irregular. There are lots of sign to check like if your cervical mucus changes, when you are ovulating, the consistency may appear to be sticky or creamy. Other signs like breast tenderness, increased sexual desire and your body basal temperature changes as well. So, it is important to track you temperature every morning using a BBT thermometer.

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  • Sam

    Hi I’ve been off the pill 10mnths now and have only had 2periods how can I work out when I’m olvuating ?

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  • Maureen Stephens, RN

    Since you have irregular periods, I suggest that you make use of ovulation predictor kits to determine your ovulation dates. In addition, your ovulation is most likely occurring if your cervical mucous changes in color, body basal temperature rises and if your body experiences back pains or abdominal cramps.

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  • Maysaa

    My husband and I have been TTC for 9 months. My periods have been regular since I started them at the age of 11. Never missed a period, and they are always consistent (6-7 days long)
    I am now 15days late for my period. I have used P test from the 2nd day of my missed period up to 8 days… all have been negative.
    I have not tested since then and was told by Gp I need to wait until the due date of my next cycle. They will not do a blood test on the NHS. Now I am 15days late I would like to test again.
    Could I be pregnant? I know many of my friends did not know 100% until they were 8-10 weeks pregnant. I do not know when I would of conceived but I calculated roughly, that I would be about 4/5 weeks pregnant by now. And some have said that may still be too early to tell.
    I started to observe my cycles from when we started to TTC, and learnt when roughly I ovulated by checking discharge.
    Just before my period was due, I had no Period signs as I used to get such as cramping, mood swings, spots, back ache etc. I started to get symptoms after I was late by 5 days and I had a tiny amount of spotting for 2 days (bright red) when I was 10days late. But that stopped, my cramps have continued and are fading now. And no sign of period… I have been feeling dizzy, light headed, weak, extremely hungry and fatigue (sleep 10-12 hours a day) whereas, before I used to sleep 6 hours a night. My sleeping pattern has really changed.
    I have had 2 Trans vaginal scans in the past and my ovaries are clear and normal and so is the uterus. So I do not have PCO or any fibroids/masses etc.
    I am not stressed out and have not been stressed out previously, only now on day 15 I am getting a little worried as all tests were negative and thinking maybe its an illness I have that’s stopping my periods.
    Thank you
    KR

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  • Lolo

    Maysaa, I know exactly what you are going through. Having had regular periods from the same age, so regular that I knew when they were coming just by looking at the moon! Then, as soon as my partner and I made the decision to ttc my periods suddenly became irregular. Just a few months before trying I had seen the doctor about my periods as they had become painful to the point of passing out. All tests came back clear. As I had a history of mc my dr had arranged a series of blood tests to determine the reasons for my losses and why I had not conceived since my last mc. Again all blood tests came back clear. Used ovulation trackers, calendars, changed my diet but after 8 months my periods were now every 9 weeks or so and I was starting to worry that something was seriously wrong. I was tested for pcos but surprise surprise that came back clear too. The mystery is that I still ovulate every month with ewcm being a strong indicator but still have no periods, my last one was at the beginning of march. At 36 years old all my dr could tell me was that because of my age my periods would diminish but I find it strange that this is happening as soon as I want to conceive.
    It does stress you out even though you don’t realise it. Your mind is so fixated on wanting to conceive that it subconsciously takes over. I’m keeping my fingers and toes crossed at the moment as I have just recently had ewcm and am hoping that I have timed it right!
    Just don’t give up hope, I haven’t. My fingers are crossed. :)

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  • wannabby

    I have been trying to conceive for 1 year and I have recently had blood work and an endometrium biopsy, which they all shown no signs of problems. I do, unfortunately have irregular periods and have for quite some time. My Dr. decided to place me on a medication called Provera to induce my periods. I’ve only taken it for 1 month so far and it caused me to have a period for 11 days. I guess what I would like to know is how do I calculate my ovulation, and if this medication will consistently have me with 11 day periods?

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  • Monica Scott, RN

    Since Fertibella ConceiveEasy is specifically designed to stimulate ovulation by regulating hormones and normalizing your menstrual cycle, you can certainly improve your menstrual cycles. Best of Luck!

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  • Dr. Christine Lee, MD

    Knowing that your Depo Provera shots can disrupt your hormonal levels, there is a good chance that your menstrual cycles would not be consistent. However; it will gradually normalize as soon as your hormonal levels go back in to place.Since you have irregular menstrual cycles, I do recommend that you calculate your ovulation dates using an ovulation predictor kit in order for you to accurately determine the exact date you’re ovulating.

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  • kali

    I have been off birth control for a little over a year now. I never prevented pregnancy. at times, my boyfriend and I were trying to conceive. my periods are irregular. the month before last, there was 3 weeks in between my periods. last month, there was about 5 weeks in between my period and it was not too heavy. I have yet to get pregnant. I’m starting to worry that I may never be able to have children. is it normal that I haven’t become pregnant after a little over a year of not using birth control and not preventing pregnancy?

    thanks for the help!

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  • Dr. Christine Lee, MD

    It may take some time after getting off birth control before ovulation begins. Studies show that some women take up to 2-6 months to ovulate after getting off the pill. Some even longer. It all depends on your body’s ability to regain it’s normal rhythm for ovulation. You can help speed up the process by keeping yourself in good health and taking prenatal vitamins.

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  • sumaria

    My husband and I are trying to get pregnant. I stopped taking the birth control one month ago and I’m 4 days late. I took a pregnancy test and it came up negative. I’m having pretty bad cramps and bloating. A couple of times I felt like my period was coming but never did. What should I do?

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  • Irene

    I have irregular periods and don’t know when I ovulate. Sometimes it takes 35 days for the next flow or 50 days. I have cramps before it flows and my tummy is getting
    bloated what could this be?

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  • Irene

    I would also like to know if th
    at will affect my fertility or chances of getting pregnant and there’s any medication or treatment for me.

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  • Queen

    i am irregular, i was supposed to get my period on the 13th but i got it on the 10th, for the past month my partner and i tried to conceive but to no avail, how do i keep track as i do not know when i am ovulating. it actually changes sometimes it will be a full 28 day and i will get on the 28th day but lately it is 22 day and i get on the 22th day. iam confused i went to the doc and they said it is just normal.

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  • Queen

    i mean on the 14th not the 13th.

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  • Ashley

    Okay I’m having trouble figuring out when I’m apparently supposed to ovulate.. I started my period on the 15th of this month and I just stopped today the 21st… (7days) So do we start trying on the 22nd or the 29th???? I’m so confused?! Can anyone answer this for me?

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  • coce

    i have been trying for a baby since christmas. last pregnancy was an ectopic, was gicen methtrexate and peroids have been irregular ever since, normaly anywhere between 6-9 weeks… started tracking my basal temp and mucus…

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  • shan1

    Hi I am 29 years and me and my partner are trying for a baby for the first time, my period is irregular, my menses falls on 18th of July 2014. My circle length is 26 and my period normally last for 4 days. Canyou please calculate it and tell me when I ovulate?

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  • Sheri

    My periods are regular between 26 or 28 days but then I stay on it for over 7 days do I still ovulate within the 14th and so forth days

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  • rissa

    I been off the pill for 4months my period was 4days late but am still not problem can someone help me

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  • DGELIZA

    MY HUSBAND AND I BEEN TRYING TO HAVE A BABY BEEN OFF THE IMPLANON FOR 7 MO FOR THE PAST 3 MONTHS I BEEN REGULAR AND THIS MONTH IM 3 DAYS LATE TOOK A PREGNANCY TEST AND NEGATIVE TEST THIS MORNING CAN I STILL BE PREGNANT

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  • maria

    hi Dr I have a quick question I get my period like every three to five months how would I ever know when I’m ovulating

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  • Lisa Cummings

    I had my period for 2 days not to sure of that’s normal I been tryin to get pregnant but have had no luck and I have a 4 yr old

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  • Jeneva Nunia

    Hi I have 6 kids from ages 9 months to 18 yes old. Count 14 days starting with the first day of your period around 27th 28th or 29th..gd luck

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  • Sam

    Hi my periods are irregular I went to the doctor. And
    She took blood test and seen I wasn’t ovulating I ask her what should I do.she put me on birth control pills I took it for two months it made me very sick I was even and pain when I wasn’t even on my period
    It even made me throw up so I stop takin the pill I gain so much weight that it took me off track she said even if I lose weight I can get back on track I been off the pill for 7 months now and I never just missed
    A period my last period was Aug 18 through the 20th I dont know what this mean I took a pregnantice test and it was negative I took it Sept the 30 could I be pregnant today is October 2nd what should I do?

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  • Tia Doe

    Hi, my period is irregular an i have missed my period last month an i took 3 pregnancy test an it came out negative i don’t know what to do what should i do?

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  • Love Scott

    I haven’t had a PERIOD in about 4months ,I’ve been trying to get pregnant, finally I got my PERIOD yesterday October 6 ,when should I try to concieve??

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