Sonogram dating and birthdate
Sonogram dating and birthdate - newspapers from atherton dating back 1929
The estimation of conception date is based on this, but is rarely ever exact since it is difficult to know exactly when ovulation occurs.
The accuracy of using your LMP to date your pregnancy depends on having regular cycles and assumes you ovulated (released an egg) on day 14 of your cycle and conceived right away - none of which may be true.It is a more accurate measure in early pregnancy than it is in later stages.Ultrasound can be used in conjunction with estimates based on last menstrual period to determine a more accurate gestational age.Tip: Sign In to save these choices and avoid repeating this across devices.You can always update your preferences in the Privacy Centre. We (Oath) and our partners need your consent to access your device, set cookies, and use your data, including your location, to understand your interests, provide relevant ads and measure their effectiveness.
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Because few women know the exact day they ovulated or conceived, an ultrasound done in the first trimester of pregnancy has been shown to the be the most accurate way to date a pregnancy.