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Medscape is the leading online destination for healthcare professionals seeking clinical information.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. Check mild interactions to serious contraindications for up to 30 drugs, herbals, and supplements at a time.Formulary Information Access health plan drug formulary information when looking up a particular drug, and save time and effort for you and your patient.Plus, more than 600 drug monographs in our drug reference include integrated dosing calculators.Image Collections Hundreds of image-rich slideshow presentations visually engage and challenge readers while expanding their knowledge of both common and uncommon diseases, case presentations, and current controversies in medicine.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.
Plus, search the MEDLINE database for journal articles.Easily compare tier status for drugs in the same class when considering an alternative drug for your patient.Medical Calculators Medscape Reference features 129 medical calculators covering formulas, scales, and classifications.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. 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].