Thanks for the query.
If you use the PrimulotN for around 29 days continuously, possibly it will suppress the ovulation.
In that case the possibility of pregnancy
You should not miss the tablet on any day.
Missing the tablet may not serve the purpose of contraception
And also if you alter the time of intake of pills, that can lead to withdrawal bleeding.
After stopping the pills usually in 4 to 5 days, you can get the withdrawal bleeding.
Then from next cycle onwards you have to go for some regular method of contraception.