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  2. Pregnancy - Wikipedia

    en.wikipedia.org/wiki/Pregnancy

    Pregnancy is divided into three trimesters of approximately three months each. [4] The first trimester includes conception, which is when the sperm fertilizes the egg. [4] The fertilized egg then travels down the Fallopian tube and attaches to the inside of the uterus, where it begins to form the embryo and placenta. [4]

  3. Estimated date of delivery - Wikipedia

    en.wikipedia.org/wiki/Estimated_date_of_delivery

    Naegele's rule is a standard way of calculating the due date for a pregnancy when assuming a gestational age of 280 days at childbirth. The rule estimates the expected date of delivery (EDD) by adding a year, subtracting three months, and adding seven days to the origin of gestational age.

  4. 'Due dates are just a suggestion': Ashley Graham shares full ...

    www.aol.com/lifestyle/due-dates-just-suggestion...

    The Florida-based OB/GYN explains that, according to the Society of Maternal Fetal Medicine and the American College of Obstetricians and Gynecologists (ACOG), the optimal time to give birth is...

  5. Gestational age - Wikipedia

    en.wikipedia.org/wiki/Gestational_age

    The most common system used among healthcare professionals is Naegele's rule, which estimates the expected date of delivery (EDD) by adding a year, subtracting three months, and adding seven days to the first day of a woman's last menstrual period (LMP) or corresponding date as estimated from other means. Medical fetal viability[edit]

  6. Pregnancy rate - Wikipedia

    en.wikipedia.org/wiki/Pregnancy_rate

    The time with the highest likelihood of pregnancy resulting from sexual intercourse covers the menstrual cycle time from some 5 days before until 1 to 2 days after ovulation. [10] In a 28‑day cycle with a 14‑day luteal phase, this corresponds to the second and the beginning of the third week.

  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. [15]

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