A woman is wondering if she might be pregnant.She knows that the most reliable pregnancy test (done in a doctor's office)can detect a pregnancy about 4 days after the embryo arrives in the uterus.The earliest time at which she could expect an accurate result from this test would be _______ after the day of possible fertilization.

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The question states that the most reliable pregnancy test can detect a pregnancy about 4 days after the embryo arrives in the uterus. In order for the embryo to arrive in the uterus, fertilization must first occur, which can take about 6-10 days after sexual intercourse. Therefore, if the woman has had sex and thinks she may be pregnant, she should wait at least 8 days after intercourse to take the pregnancy test in order to allow enough time for the embryo to arrive in the uterus and for the test to be accurate.

A Woman Is Wondering If She Might Be Pregnant