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  2. Pregnancy test - Wikipedia

    en.wikipedia.org/wiki/Pregnancy_test

    False negative readings can occur when testing is done too early. hCG levels rise rapidly in early pregnancy and the chances of false negative test results diminish with time (increasing gestational age). [22] Less sensitive urine tests and qualitative blood tests may not detect pregnancy until three or four days after implantation. [23]

  3. Progestogen challenge test - Wikipedia

    en.wikipedia.org/wiki/Progestogen_challenge_test

    The test is performed by administering a progestogen, such as progesterone either as an intramuscular injection or oral medroxyprogesterone acetate (Provera). If the patient has sufficient serum estradiol (greater than 50 pg/mL), withdrawal bleeding should occur 2–7 days after the progestin is withdrawn, indicating that the patient's ...

  4. Postcoital test - Wikipedia

    en.wikipedia.org/wiki/Postcoital_test

    The PCT examines sperm survival in cervical mucus during the pre-ovulatory period and determines whether sperm are migrating into the female reproductive system. It does not predict whether pregnancy can occur. The test is performed 1 to 2 days before ovulation, when estrogen-stimulated cervical mucus is abundant.

  5. *This* Is The Best Time Of Day To Take A Pregnancy Test For ...

    www.aol.com/best-time-day-pregnancy-test...

    In general, it's best to wait until you've missed your period, and to take the test first thing in the morning. Learn how timing impacts accuracy from experts.

  6. Pre- and post-test probability - Wikipedia

    en.wikipedia.org/wiki/Pre-_and_post-test_probability

    Diagram relating pre- and post-test probabilities, with the green curve (upper left half) representing a positive test, and the red curve (lower right half) representing a negative test, for the case of 90% sensitivity and 90% specificity, corresponding to a likelihood ratio positive of 9, and a likelihood ratio negative of 0.111.

  7. Prenatal testing - Wikipedia

    en.wikipedia.org/wiki/Prenatal_testing

    The results of the blood test are then combined with the NT ultrasound measurements, maternal age, and gestational age of the fetus to yield a risk score for Down syndrome, trisomy 18, and trisomy 13. First Trimester Combined Test has a sensitivity (i.e. detection rate for abnormalities) of 82–87% and a false-positive rate of around 5%. [74] [75]

  8. Predictive value of tests - Wikipedia

    en.wikipedia.org/wiki/Predictive_value_of_tests

    Predictive value of tests is the probability of a target condition given by the result of a test, [1] often in regard to medical tests.. In cases where binary classification can be applied to the test results, such yes versus no, test target (such as a substance, symptom or sign) being present versus absent, or either a positive or negative test), then each of the two outcomes has a separate ...

  9. Fern test - Wikipedia

    en.wikipedia.org/wiki/Fern_test

    The disappearance of the fern pattern after the 22nd day suggests ovulation, and its persistence throughout the menstrual cycle may suggest an anovulatory cycle. [3] Ferning is now most commonly used as a test for prelabor rupture of membranes which refers to the rupture of the amniotic sac during pregnancy.

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