Pregnancy calendar from conception
Common Questions and Answers about Pregnancy calendar from conception
pregnancy
I was single at the time of conception and had intercourse with man A on January 31st. I have written on my period calendar that I had my period feb 6th however I still for some reason question if I had it just because I'm being a worry wart. On February 28th a month later I had sex with man B. About six weeks later I took a pregnancy test and it was positive.
Depending on how regular your cycles are, it could be either guy. Since this is May, go to the ob-gyn like right now, and get an ultrasound. Tell them you aren't sure when your last period was and ask them to tell you the estimated due date of the baby, based on the embryo's measurements and developmental markers. You're still early enough in the pregnancy for an ultrasound to be helpful in dating conception, but this won't be true for long.
You cannot pinpoint conception from an ulltrasound done on September 27 if you are thinking you might have conceived in early July. You would have been 12 weeks along when you got the ultrasound, and by then many doctors would tell you there is a margin for error of +/- 7 days when using an ultrasound to try to determine conception. This gives a range of late June through July 12 or later. When did you have the sex you are concerned about? Did you have two partners in that time period?
Doctors calculate pregnancy using a 40-week calendar, though from the date of conception, pregnancy is only 38 weeks long. They go back and start the count on the first day of your last period. This is the way doctors have dated pregnancy for a long time, certainly from before the invention of ultrasounds, because the first day of a period is a noticeable signal and known date, and ovulation is hidden and happens on a date not usually known.
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Once you get an estimated due date that comes from the size of the embryo in the ultrasound, you can either count back from it 266 days on a calendar, or you can put it into an online conception calculator, and it will give you an estimated conception date. But you need that due date to be based on the information from the ultrasound.
If a doctor tells you a certain number of weeks pregnant, ask if he is talking about how long since conception.
Pregnancy is measured as 280 days from first day of your last menstrual cycle (day 1 of bleeding) to full term birth. It's measured as 266 days from assumed date of conception to full-term birth.
If you use the first, 280-day measurement, and IF you think a month is 28 days long (not very realistic since only February is that short) you can get to 10 months using the count from first day of your last period to full term.
t know when your last period was) from an ultrasound before your 8th week or so, it should be pretty close. If you get a conception date from a doctor just looking at a calendar or a little cardboard wheel and no ultrasound is done, then it's all about how regular your cycles are. If your cycles are not regular or are not about every 28 days, counting forward on a calendar won't tell you much.
In your position I would go right away to a doctor and get an ultrasound scan, since ultrasounds early in the pregnancy can help to confirm when the conception was. Tell the doctor that you would like to know the estimated due date based on the measurements of the embryo and its developmental markers, not on the first day of your last period. Then take the estimated due date home and plug it into an online conception calculator (or count back 266 days on a calendar).
It is possible to bleed in early pregnancy. However, usually an ultrasound report gives the date of the first day of your last period, not a conception date. Please be sure "conception" date is really what you are reading; it is unusual for an ultrasound to date a pregnancy from a presumed date of conception.
Also, when was the ultrasound done? If it was recent and you got pregnant six months ago, it is very normal for an ultrasound to be off by a few days.
You count back 38, the first two weeks of pregnancy is before conception...just remember that sperm can live inside us 5-7 days so whatever date you figure out, it's still better if you get that DNA test because you could still be wrong. Hope this website helps a little...I love it, just replace my due date with yours:
http://www.pregnology.com/faralong.php?
Then either use an online conception calculator or else just count back 266 days from the estimated due date on a calendar, and that would be your probable conception date.
But, if you have gotten an ultrasound and your doctor gave you the due date of August 25, AND if the ultrasound was early enough in your pregnancy, it is going to be more reliable than a forward projection by the calendar from the first day of the last period. This is because women don't ovulate exactly by the calendar, and because the ultrasound saw and measured the actual baby.
Most doctors originally calculate your due date by the first day of your last known period which means at the time of conception your pregnancy is considered 2 weeks when the baby is conceived so that can explain the difference in due dates.
All medical textbooks, computer-generated counts, and language used by doctors and nurses use that count even though modern technology now can help to pinpoint the conception date more accurately. That is why pregnancy, which takes 38 weeks from conception to full term, is still counted as being 40 weeks long. They add a spare two weeks at the front, to be able to calibrate the count to the presumed first day of the last period.
It's always tricky and a best guess, right? First, congrats on the pregnancy! That's really exciting and I hope you update us with how you are doing. I looked at a calendar and to me, it looks like the date you give in Oct. wasn't implantation but your period. That's a guess. What does your doctor say?
Do you have access to a doctor who would do an ultrasound? The best week of pregnancy for trying to decide the conception date from the ultrasound is week 7 (counted from the first day of your last period, not from the presumed date of conception). So, in about a week.
If the doctor said you are 8 weeks "along" or 8 weeks "pregnant," he is saying you're about 6 weeks since conception. Doctors use the medical way of counting, called GA or gestational age, and that count begins on the (presumed) first day of the woman's last period, not on the assumed day of conception.
The one that uses month of conception and my age at conception was wrong.
It is also significant if you got your due date from an early ultrasound or a different kind of estimate, such as counting forward on a calendar from the first day of your last period, or using a little wheel. An ultrasound in your first trimester is pretty much the only way to be able to try to figure out a conception date very specifically, other than doing a DNA test.
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