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  2. Estimated date of delivery - Wikipedia

    en.wikipedia.org/wiki/Estimated_date_of_delivery

    276 days for both ultrasound-estimated and LMP-estimated gestational age in a US study of 1867 singleton live births. [11] 281 days after LMP with a standard deviation of 13 days, was the result of a population-based study of 427,581 singleton births in Sweden. [16]

  3. Crown-rump length - Wikipedia

    en.wikipedia.org/wiki/Crown-rump_length

    An ultrasound showing an embryo measured to have a crown-rump length of 1.67 cm and estimated to have a gestational age of 8 weeks and 1 day. Crown-rump length (CRL) is the measurement of the length of human embryos and fetuses from the top of the head (crown) to the bottom of the buttocks (rump).

  4. Gestational age - Wikipedia

    en.wikipedia.org/wiki/Gestational_age

    If the gestational age as calculated from an early ultrasound is contradictory to the one calculated directly from the last menstrual period, it is still the one from the early ultrasound that is used for the rest of the pregnancy. [2] In case of in vitro fertilization, calculating days since oocyte retrieval or co-incubation and adding 14 days ...

  5. Pregnancy - Wikipedia

    en.wikipedia.org/wiki/Pregnancy

    Pre-conception counseling is care that is provided to a woman or couple to discuss conception, pregnancy, current health issues and recommendations for the period before pregnancy. [ 87 ] Prenatal medical care is the medical and nursing care recommended for women during pregnancy, time intervals and exact goals of each visit differ by country ...

  6. Age and female fertility - Wikipedia

    en.wikipedia.org/wiki/Age_and_female_fertility

    44% will have a conception ending in a live birth within one year 64% will have a conception ending in a live birth within four years [ 13 ] According to a study done on a sample of 782 healthy European couples ages 19–39, fertility starts declining after age 27 and drops at a somewhat greater rate after age 35.

  7. Pregnancy test - Wikipedia

    en.wikipedia.org/wiki/Pregnancy_test

    The assays used to detect the presence of hCG in blood or urine are generally reliable and inexpensive. Secretion of hCG can occur as soon as 6 days following ovulation and on average 8–10 days following ovulation; this is the earliest hCG can be detected in a blood sample. [7] [5] [8] The hCG concentration in blood is higher than in urine ...

  8. Obstetric ultrasonography - Wikipedia

    en.wikipedia.org/wiki/Obstetric_ultrasonography

    Obstetric ultrasonography, or prenatal ultrasound, is the use of medical ultrasonography in pregnancy, in which sound waves are used to create real-time visual images of the developing embryo or fetus in the uterus (womb).

  9. Fertility testing - Wikipedia

    en.wikipedia.org/wiki/Fertility_testing

    Urinary ovulation prediction kits are typically found over-the-counter and there are many brands to choose from. This test measures the amount of luteinizing hormone, a hormone that increases just before ovulation, that is in the urine. Before ovulation, the luteinizing hormone levels dramatically increase; this is known as the "LH surge".

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