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  2. Basal body temperature - Wikipedia

    en.wikipedia.org/wiki/Basal_body_temperature

    Basal body temperature (BBT or BTP) is the lowest body temperature attained during rest (usually during sleep). It is usually estimated by a temperature measurement immediately after awakening and before any physical activity has been undertaken. This will lead to a somewhat higher value than the true BBT. In women, ovulation causes a sustained ...

  3. Fertility awareness - Wikipedia

    en.wikipedia.org/wiki/Fertility_awareness

    Chance of fertilization by day relative to ovulation. [1] Fertility awareness (FA) refers to a set of practices used to determine the fertile and infertile phases of a woman's menstrual cycle. Fertility awareness methods may be used to avoid pregnancy, to achieve pregnancy, or as a way to monitor gynecological health.

  4. 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 ...

  5. Sexual activity during pregnancy - Wikipedia

    en.wikipedia.org/wiki/Sexual_activity_during...

    Most women can continue to engage in sexual activity during pregnancy, including sexual intercourse. [1] Most research suggests that during pregnancy both sexual desire and frequency of sexual relations decrease. [2][3] In context of this overall decrease in desire, some studies indicate a second-trimester increase, preceding a decrease during ...

  6. Pregnancy - Wikipedia

    en.wikipedia.org/wiki/Pregnancy

    End of second trimester + 2 weeks (26 weeks of pregnancy) The fetus is genetically different from its mother and can therefore be viewed as an unusually successful allograft . [ 52 ] The main reason for this success is increased immune tolerance during pregnancy, [ 53 ] which prevents the mother's body from mounting an immune system response ...

  7. Maternal physiological changes in pregnancy - Wikipedia

    en.wikipedia.org/wiki/Maternal_physiological...

    During pregnancy the plasma volume increases by 40-50% and the red blood cell volume increases only by 20–30%. [20] These changes occur mostly in the second trimester and prior to 32 weeks gestation. [22] Due to dilution, the net result is a decrease in hematocrit or hemoglobin, which are measures of red blood cell concentration.

  8. Billings ovulation method - Wikipedia

    en.wikipedia.org/wiki/Billings_ovulation_method

    The possibility of pregnancy from sperm survival longer than five days has been compared to "the chances of winning a huge lottery." [4] Menstruation will occur about 2 weeks after ovulation. A ten-year study of 45,280 subfertile couples in China found that 32.1% of women were able to achieve pregnancy and live birth through the use of Billings ...

  9. Luteal phase - Wikipedia

    en.wikipedia.org/wiki/Luteal_phase

    Luteal phase. The menstrual cycle is on average 28 days in length. It begins with menses (day 1–7) during the follicular phase (day 1–14), followed by ovulation (day 14) and ending with the luteal phase (day 14–28). [1] Unlike the follicular phase which can vary in length among individuals, the luteal phase is typically fixed at ...

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