Pregnancy conception dating

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In addition, although a woman is most likely to become pregnant if she has sex on the day of ovulation conception may also occur from live sperm still in her reproductive tract on the day of ovulation if she had sex for up to five days before ovulation [26,27]. Determining the Estimated Due Date The estimated due date (EDD or EDC) is the date that spontaneous onset of labor is expected to occur. Conceptional age, menstrual age, and ultrasound age: a second-trimester comparison of pregnancies of known conception date with pregnancies dated from the last menstrual period. guess what I got pregnant the next month after using it. I have had two kids and I still don't know what the signs of pregnancy are or how you can tell. Is it possible that my period could just be late and I'm freaking myself out?

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It's important to remember that 80 percent of babies are born within 2 weeks of their due dates, but less than 5 percent of babies are born on their precise due dates.

Subtract 266 days, which is 38 weeks, from your due date to know the date of conception.

Your health care provider can help you determine your due date by using ultrasound pictures and charting the growth of your baby. If your cycle is longer or shorter than 28 days, this calculation won't be entirely accurate.

Determining the Date of Conception Because the human egg is capable of fertilization for only 12 to 24 hours after ovulation the date of ovulation may be taken as being the date of conception.

However, ultrasound determination of the date of ovulation has the same imprecision as does the ultrasound estimate of the gestational age and, therefore, a precise date of conception cannot usually be determined as with in vitro fertilization.

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