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  2. Estimated date of delivery - Wikipedia

    en.wikipedia.org/wiki/Estimated_date_of_delivery

    [13] [14] The result is approximately 280 days (40 weeks) from the start of the last menstrual period. Another method is by adding 9 months and 7 days to the first day of the last menstrual period. Naegele's rule is named after Franz Karl Naegele, the German obstetrician who devised the rule. Naegele was born July 12, 1778, in Düsseldorf, Germany.

  3. Gestational age - Wikipedia

    en.wikipedia.org/wiki/Gestational_age

    For example, if there is a gestational age based on the beginning of the last menstrual period of 9.0 weeks, and a first-trimester obstetric ultrasonography gives an estimated gestational age of 10.0 weeks (with a 2 SD variability of ±8% of the estimate, thereby giving a variability of ±0.8 weeks), the difference of 1.0 weeks between the ...

  4. Pregnancy - Wikipedia

    en.wikipedia.org/wiki/Pregnancy

    Embryo stage begins; also, first missed period: 4 weeks Day 15 [33] Day 9 Primitive heart function can be detected: 5 weeks, 5 days [33] Day 26 [33] Day 20 Fetal stage begins 10 weeks, 1 day [33] 8 weeks, 1 day [33] 7 weeks, 2 days First trimester ends 13 weeks 11 weeks 10 weeks Second trimester ends 26 weeks 24 weeks 23 weeks Childbirth: 39 ...

  5. Menstruation - Wikipedia

    en.wikipedia.org/wiki/Menstruation

    Diagram illustrating how the uterus lining builds up and breaks down during the menstrual cycle Menstruation (also known as a period, among other colloquial terms) is the regular discharge of blood and mucosal tissue from the inner lining of the uterus through the vagina. The menstrual cycle is characterized by the rise and fall of hormones. Menstruation is triggered by falling progesterone ...

  6. Pregnancy test - Wikipedia

    en.wikipedia.org/wiki/Pregnancy_test

    For a qualitative test the thresholds for a positive test are generally determined by an hCG cut-off where at least 95% of pregnant women would get a positive result on the day of their first missed period. [11] Qualitative urine pregnancy tests vary in sensitivity.

  7. Calendar-based contraceptive methods - Wikipedia

    en.wikipedia.org/wiki/Calendar-based...

    A woman whose menstrual cycles ranged in length from 30 to 36 days would be estimated to be infertile for the first 11 days of her cycle (30-19=11), to be fertile on days 12–25, and to resume infertility on day 26 (36-10=26). When used to avoid pregnancy, such fertility awareness-based methods have a typical-use failure rate of 25% per year. [18]

  8. Signs and symptoms of pregnancy - Wikipedia

    en.wikipedia.org/.../Signs_and_symptoms_of_pregnancy

    There is a small amount of evidence that rutosides (a herbal remedy) may relieve symptoms of varicose veins in late pregnancy but it is not yet known if rutosides are safe to take in pregnancy. [25] Risk factors include obesity, lengthy standing or sitting, constrictive clothing and constipation and bearing down with bowel movements. [citation ...

  9. Miscarriage - Wikipedia

    en.wikipedia.org/wiki/Miscarriage

    A chemical pregnancy is a pregnancy that was detected by testing but ends in miscarriage before or around the time of the next expected period. [ 64 ] Chromosomal abnormalities are found in more than half of embryos miscarried in the first 13 weeks.

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