I told my work the truth... But when ever I needed a medical certificate for work the reason they put on it was "for hospitalisation and extensive medical testing". This was given for when I needed time off after a miscarriage and D&C, when I had really bad OHSS and again when I had a complete melt down in the lead up to another collection and know OHSS was coming again. They were even nice enough to give me medical certificates with just my doctor's name on them and not the name of the clinic.

BW