Hi,
As far as I know, if you have more than 15 follicles retrieved, you will be introduced with daily progestrone inserts or daily progestrone jabs. If u opt for the daily progestrone jabs, u will need to visit KK everyday as u will require a medical staff to do it. I had 21 follicles retrieved but was not introduce with OHSS pills. However, I opted for both progestrone inserts and jabs as I have history that my progestrone level dropped drastically during the 2WW.
If you have less than 15 follicles retrieved, pregyln jabs will be introduced. This jab is given every 3-4 days. The reason why pregyln jabs is introduced for less than 15 follicles retrieve is because hormone level is usually lesser; thus OHSS is less likely to occur as compared to those with many follicles retrieved.