1. Cervical mucus: On days of high fertility, the cervical mucus is stretchy, like raw egg white. This provides a hospitable environment for sperm and fertilisation cannot take place without it.
2. Temperature: On fertile days, body temperature is usually 2/10 lower than on the days following ovulation. Analysing the temperature curve produces an conclusive picture of whether ovulation has actually occurred, when the fertile period has definitely come to an end and whether the menstrual cycle is disturbed.
3. Hormones: A rise in the level of the sexual hormones LH and E3G shows the fertile days prior to ovulation. These hormones can be measured at home using test sticks or by a doctor using a blood test.
4. Ultrasound: Shows the current development of the follicles in the ovaries.
|What is analysed?||Method||Advantages||Disadvantages|
|Cervical mucus||Sensiplan, Rötzer, Billings||can be used anywhere, provides best indication of days of high fertility, excellent basis for further medical treatment||Measuring process has to be learned, daily observation recommended|
|Temperature||Contraception monitors, temperature method, Sensiplan, Rötzer||Can be used at home, provides indication of fertile days, end of fertile period, disturbances to the cycle, pregnancy. Excellent basis for further medical treatment||Daily measurement recommended, manual analysis of data has to be learned (except for contraception monitors)|
|Hormones levels in urine||Fertility monitors, ovulation tests||Clearly indicate fertile days||Several tests needed at the right time|
|Hormone levels in blood||Only at the doctor's||Snapshot of current stage of the menstrual cycle||Has to be carried out by a doctor on the right days of the cycle|
|Ultrasound||Only at the doctor's||Clearest indication of the exact day of ovulation||Has to be carried out by a doctor on the right days of the cycle|