Hello
Ovulation occurs once in a month , one ovum releases on one side ( either left or right ) on alternate month .
This is unfortunate that due to ECTOPIC
pregnancy you lost your left
fallopian tube .
Now there is only one tube on the right side .
It means you are ovulating but once in two months because of one tube ( I think ,you understand this thing ).
Ubiphene is used for stimulation of follicle ( s) so that they develop , attain maturity and release ovum ) .
Your doctor advise you ubiphene for OVULATION , this is a very good medicine .
But I have different opinion regarding this for your case , since you are having very potent right side fallopian tube i.e. right tube is liberating ovum ( but once in two months times ) means you can get pregnancy NOT EVERY MONTH but once in two month .
So get in ovulation study and try to get pregnant ( as ovulation occurs on day 14th 15th after 1st day of menses ) .
So first try as natural pregnancy , if no success then try Ubiphene .
Once , again I would like to suggest you that this is my opinion , final authority lies with you your treating doctor.
Hope you understand very well , good luck for you.