Enter your email address and we'll send you a link to reset your password. 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. Pettker, MD; James D. Right now there is a lone egg and a whole bunch of anxious sperm eager to fertilize the egg. Pregnancy lasts an average of days 40 weeks from the first day of your last menstrual period LMP.
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You can calculate your due date by subtracting three months from the first day of your last menstrual period LMP and then add a week. News is a nonprofit independent media publication. Please select your last menstrual period. Do you have an enquiry or suggestion? Gestational age is a measure of the age of a pregnancy which is taken from the beginning of the woman's last menstrual period LMPor the corresponding age of the gestation as estimated by a more accurate method if available.
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