How to Monitor Ovulation at the Hospital

Patient's question:

Patient gender: Female
Patient age: 30
How to monitor ovulation at the hospital

Doctor's answer:

Here is the English translation of the provided content, with the original line breaks preserved and all Chinese text translated into English:
"First is the cervical mucus method, which is performed in a gynecological department of a hospital to determine if a woman is in her ovulation period by examining cervical mucus.
Second is the basal body temperature method: Measure your temperature every morning after waking up. Generally, your temperature is lower in the first half of the cycle, drops further during ovulation, and then gradually rises afterward.
Third is the menstrual cycle calculation method. Many women do not know exactly when their ovulation period occurs, but by using the following formula and testing over a period of time, it can be easily calculated.
The calculation formula is:
First day of ovulation period: Cycle days minus 18
Last day of ovulation period: Cycle days minus 11"