Calculating Date of Ovulation

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Calculating a date of ovulation requires keeping track of cervical mucous changes, body temperature changes and the cycle days, as ovulation usually occurs during day 14 of a 28-day menstrual cycle. Find out when you are ovulating with helpful information from a certified nurse-midwife in this free video on pregnancy.

Part of the Video Series: Pregnancy Information
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Video Transcript

So, you're curious when it is that you're ovulating. This is Mavis Schorn, professor and certified nurse-midwife, from Vanderbilt University School of Nursing, here to try to help you figure that out. Well, if you have regular menstrual cycles that really helps, and every woman cycles a little differently. On average, most women have a menstrual period every twenty eight days. We ovulate between our menstrual cycles, usually on day fourteen. And what that means is if you're, the first day of your period is day one and you count forward day fourteen then that's around the day of ovulation. That's also assuming you have a twenty eight day cycle. Some other signs that you can look at to find figure out if this is the right time for you; you may notice that your cervical mucous changes. When you get towards time of ovulation, or when you're actually producing an egg it becomes clear and slimy like, and if you were to even look under the microscope at that it's got, it's got channels in there that it actually helps sperm get up to your egg. So, what you notice at that mid-cycle time is that it's like egg white, very thin and slimy. And then, something else you can do that takes a little bit more time is you can check your temperature. You need to use what's called a basal body temp thermometer, and you need to, it's different than the regular. There are digital ones and there are mercury ones, but it should say basal body temperature, because the temperature change is very subtle. It's about a half a degree to a degree increase in the second half of the cycle if you've ovulated. So, it's something that you do. You check your temperature first thing in the morning every day, and you chart that. If you chart it you will see how your temperature rises if you ovulated the second half of the cycle. Now, some people ask about ovulation kits. I'll tell you I'm not a big proponent of those, because they're very expensive and you have to use them over time, and people typically don't get pregnant the first first month they try, so then you're using a lot of kits over time and it costs a lot. So, the advantage of using your, looking at your cervical mucous, even your thermometer, or checking the calendar is it's cheap, you get to know your own body, and and it works for for most people. Now keep in mind, if it's your first baby it may take six to twelve months in order to get pregnant the first time. If you're over thirty five you may want to talk to your midwife or physician and see how long that you want to wait before you look into any other assistance in getting pregnant.


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