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  2. 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]

  3. Pregnancy - Wikipedia

    en.wikipedia.org/wiki/Pregnancy

    Menstrual period begins Day 1 of pregnancy Not pregnant: Not pregnant: Has sex and ovulates: 2 weeks pregnant Not pregnant: Not pregnant: Fertilization; cleavage stage begins [33] Day 15 [33] Day 1 [33] [34] Not pregnant: Implantation of blastocyst begins Day 20 Day 6 [33] [34] Day 0 Implantation finished Day 26 Day 12 [33] [34] Day 6 (or Day 0 ...

  4. Ovulation - Wikipedia

    en.wikipedia.org/wiki/Ovulation

    The days in which a woman is most fertile can be calculated based on the date of the last menstrual period and the length of a typical menstrual cycle. [4] The few days surrounding ovulation (from approximately days 10 to 18 of a 28-day cycle), constitute the most fertile phase.

  5. Menstrual cycle - Wikipedia

    en.wikipedia.org/wiki/Menstrual_cycle

    Menstrual cycle The menstrual cycle is a series of natural changes in hormone production and the structures of the uterus and ovaries of the female reproductive system that makes pregnancy possible. The ovarian cycle controls the production and release of eggs and the cyclic release of estrogen and progesterone. The uterine cycle governs the preparation and maintenance of the lining of the ...

  6. What It Means If Your Period Came Early This Cycle - AOL

    www.aol.com/normal-length-cycle-could-anywhere...

    Everyone’s cycle looks different, so there could be a number of reasons behind why your period came early. A typical menstrual cycle is thought to last exactly 28 days—however, it can actually ...

  7. CycleBeads - Wikipedia

    en.wikipedia.org/wiki/CycleBeads

    CycleBeads, a color-coded string of beads that represents the days of a woman's cycle, helps an individual use the Standard Days Method, by helping her track her cycle days. Starting the first day of her period, she moves a band to the red bead then to a new bead every day. The color of the bead lets her know if today is a day she is highly ...

  8. Pregnancy rate - Wikipedia

    en.wikipedia.org/wiki/Pregnancy_rate

    As an example, one center in the United States reported an implantation rate in IVF of 37% at a maternal age of less than 35 years, 30% at 35 to 37 years, 22% at 38 to 40 years, and 12% at 41 to 42 years. [3] Successful implantation of the zygote into the uterus is most likely 8 to 10 days after conception. If the zygote has not implanted by ...

  9. Menstruation - Wikipedia

    en.wikipedia.org/wiki/Menstruation

    The first day of menstrual bleeding is the date used for the last menstrual period (LMP). The typical length of time between the first day of one period and the first day of the next is 21 to 45 days in young women, and 21 to 35 days in adults. [2] [3] The average length is 28 days; one study estimated it at 29.3 days. [10]