How to calculate ovulation period in a 45-day menstrual cycle?

We all know that a woman's menstrual cycle is about thirty days, but due to individual differences, this cycle can be longer or shorter. In life, a woman’s menstrual cycle may become very unstable due to dietary, physical or psychological reasons. This actually requires going to the hospital for examination and treatment. So, how do you calculate the ovulation period when your menstrual cycle is 45 days?

The so-called menstrual cycle refers to the number of days from the first day of menstruation to the first day of the next menstruation. Usually, a menstrual cycle is divided into three parts. The period before ovulation is called the ovulatory phase, and the period before ovulation and after ovulation are called the luteal phase. The duration of the luteal phase is basically fixed at about 14 days. If a woman's menstrual cycle is 28-30 days, her ovulation occurs between the 14th and 16th day of the cycle. If the woman's menstrual cycle is 40 days, her ovulation day should be around the 26th day of the menstrual cycle (about 14 days before the next menstruation).

If the menstrual cycle is 45 days, then the ovulation period is roughly around the 26th to 35th day after the onset of menstruation. However, since the menstrual cycle is relatively irregular at 45 days, the ovulation period may not be calculated accurately. It is recommended to use other methods for detection.

How to calculate ovulation period

1. Extrapolation

Usually, women ovulate about 2 weeks (12-16 days) before their next menstrual period. Therefore, you can calculate it yourself based on the rules of your previous menstrual cycles. However, the ovulation period may change due to the influence of environment, disease, mood and medication, so the calculation of ovulation date should be based on actual conditions.

2. Method for calculating the menstrual date

It is believed that each ovulation should occur about 14 days before menstruation, so the 5 days before ovulation to 5 days after ovulation are called "ovulation day". However, this method is less reliable because most women have irregular periods. In comparison, the first two methods are more reliable, but somewhat troublesome. Here we introduce you to a simple and more reliable calculation method, hoping it will be helpful to you. The calculation formula is:

The first day of ovulation = the number of days in the shortest menstrual cycle minus 18 days

The last day of ovulation = the longest menstrual cycle minus 11 days

Before using this formula for calculation, the individual is required to observe and record his or her menstrual cycle for 8 consecutive times to obtain the longest and shortest number of days in his or her menstrual cycle. The numbers obtained by substituting them into the above formula represent the beginning and end time of the woman's "ovulation period" respectively.