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Systems of fertility awareness rely on observation of changes in one or more of the primary fertility signs (basal body temperature, cervical mucus, and cervical position), tracking menstrual cycle length and identifying the fertile window based on this information, or both.
The three primary signs of a woman's fertility are her basal body temperature (BBT), her cervical mucus, and her cervical position. [54] Computerized fertility monitors , such as Lady-Comp , may track basal body temperatures, hormonal levels in urine, changes in electrical resistance of a woman's saliva, or a mixture of these symptoms.
The Couple to Couple League was founded in 1971 by John and Sheila Kippley, and lay Catholics, with the help of Dr. Konald Prem. The League was the first organization to teach a symptoms-based method of fertility awareness that relied on all three primary fertility signs: temperature, mucus, and cervical position. [1]
It is not known if historical cultures were aware of what part of the menstrual cycle is most fertile. In the year 388, Augustine of Hippo wrote of periodic abstinence. . Addressing followers of Manichaeism, his former religion, he said, "Is it not you who used to counsel us to observe as much as possible the time when a woman, after her purification, is most likely to conceive, and to abstain ...
The speed of ovulation is periodic and impacts the length of a menstrual cycle. After ovulation, the egg cell travels through the fallopian tube toward the uterus. If fertilization is going to occur, it often happens in the fallopian tube; the fertilized egg can then implant on the uterus's lining.
Ovulation is an important part of the menstrual cycle in female vertebrates where the egg cells are released from the ovaries as part of the ovarian cycle. In female humans ovulation typically occurs near the midpoint in the menstrual cycle and after the follicular phase. Ovulation is stimulated by an increase in luteinizing hormone (LH).
Ovulation occurs ~35 hours after the beginning of the LH surge or ~10 hours following the LH surge. Several days after ovulation, the increasing amount of estrogen produced by the corpus luteum may cause one or two days of fertile cervical mucus, lower basal body temperatures, or both. This is known as a "secondary estrogen surge".
Cervical dilation in centimeters; Cervical effacement as a percentage; Cervical consistency by provider assessment/judgement; Cervical position; Fetal station, the position of the top of the fetal head in relation to the pelvic bones, specifically the ischial spines. The Bishop score grades patients who would be most likely to achieve a ...