Last 3 months after period from 26th day onwards i...

when is my ovulation day

It is the day that your ovary ovulate and produce the mature egg which is ready for fertilization. Usually, it is the 14 day from the expected menses. Based on your qeustion as your menses is 25 days the ovulation day is 25 minus 14 which result in day 11. Thus from the first day of your menses you have to count 11 day which is your expected ovulation day.

Investigations to do

You can follow up your ovulation via US to follow your ovaries and folloicles measurements.

Advice

You can follow up with your gynecologist