• Bleeding

    Menstruation, bleeding or also called menstruation: With each cycle, a layer of mucous membrane forms in the uterus which forms a nest for the fertilized egg. If pregnancy does not occur, this mucosal layer is expelled during menstruation.

  • Ovaries

    The ovaries contain immature eggs.

  • Ovulation

    Ovulation is the time when the mature egg "jumps" from the ovary to the fallopian tube. The mature egg makes its way into the uterus and can be fertilized.

  • Conception

    Conception or fertilization is the moment in which the egg and the sperm come together and a new human being is born.

  • Follicular phase

    The follicular phase is a phase of the cycle. It begins on the first day of menstruation (day 1 of the cycle) and ends on the day of ovulation.

  • OFS

    Follicle-stimulating hormone. It is controlled by the pituitary gland.

  • Cervix

    The cervix is the lower part of the uterus that can be felt in the vagina. Cyclic changes in the cervix, such as cervical mucus, are another sign for observing the menstrual cycle.

  • Calendar method

    The calendar method is one of the earliest natural family planning methods. In this case, ovulation is calculated based on the duration of the cycle.

  • OL

    Luteinizing hormone. It is controlled by the pituitary and is responsible for the formation of the corpus luteum.

  • Menses

    Menstruation, bleeding or also called menstruation: With each cycle, a layer of mucous membrane forms in the uterus which forms a nest for the fertilized egg. If pregnancy does not occur, this mucosal layer is expelled during menstruation.

  • PFN

    NFP stands for Natural Family Planning and is the umbrella term for all natural family planning methods.

  • Pearl Index

    The Pearl Index evaluates the safety of contraceptives. The smaller the Pearl index, the safer the contraceptive is.

  • SPM

    PMS stands for premenstrual syndrome. It refers to the emotional and physical distress associated with the menstrual cycle.

  • Sheath

    The vagina is a muscular tube that connects the uterus to the vulva.

  • Testosterone

    Testosterone is a sex hormone found in both men and women, but in different concentrations.

  • Cervical mucus

    Cervical mucus forms in the glands of the cervix. It is affected by the hormones estrogen and progesterone and changes appearance and texture during the cycle.

  • Cycle

    The cycle begins on the first day of menstruation and ends on the last day before the next bleeding.

  • Fertilization

    Fertilization is the moment when the egg and the sperm come together and a new human being is born.

  • Yellow body

    The corpus luteum forms in the ovary after ovulation. The hormone progesterone is produced in the corpus luteum.

  • Nesting

    Implantation refers to the implantation of the fertilized egg into the lining of the uterus.

  • Egg cell

    The egg cell or oocyte is the female germ cell, the carrier of the female genetic material.

  • Follicle

    The follicle or follicle is the envelope of the maturing egg.

  • Fertility window

    The fertility window or fertile window is the period of your cycle in which you can become pregnant. This period begins five days before ovulation and ends three days after ovulation.

  • Utero

    The uterus is one of the female reproductive organs. The fertilized egg nestles in the uterus after conception and grows here until birth.

  • Corpus luteum

    The corpus luteum forms in the ovary after ovulation. The hormone progesterone is produced in the corpus luteum.

  • Base body temperature

    Core body temperature is the temperature measured in the body. The body temperature rises due to the influence of the hormone progesterone after ovulation.

  • Luteal phase

    The luteal phase is a phase of the cycle. It starts the day after ovulation and ends on the last day of your period.

  • Medium pain

    Middle Pain is a short, crampy pain in the right or left lower abdomen that occurs during ovulation. It is one of the secondary signs of fertility and can only give further clues to the fertile period.

  • Estrogen

    Estrogen is a sex hormone. It is produced in the maturing egg cell. Among other things, estrogen causes a change in the cervical mucus. The more estrogen is produced, the clearer and more stringy the cervical mucus becomes.

  • Period

    Menstruation, bleeding or also called menstruation: With each cycle, a layer of mucous membrane forms in the uterus which forms a nest for the fertilized egg. If pregnancy does not occur, this mucosal layer is expelled during menstruation.

  • Progesterone

    Progesterone is a sex hormone. It is produced by the corpus luteum. Among other things, progesterone causes an increase in the body's internal temperature.

  • Temperature method

    The temperature method is a natural family planning method. The hormone progesterone causes the temperature to rise after ovulation. This temperature rise is observed and used to determine ovulation.

  • Contraception

    Contraception refers to the prevention of conception. There are three main types of contraception: hormonal, mechanical or natural.

  • Intermediate bleeding

    Bleeding between menstruation or ovulation is bleeding associated with ovulation. It is a secondary sign of fertility and can only give further clues to the fertile period.