Thank you for your query.
On a 28 day cycle, normally by day 14, the follicle should be around 20 - 22 mm, and ready for rupture ( ovulation ). An endometrium of 10 mm or more is considered good.
You are having lag in follicle growth as well as in endometrial development.
You could be having hormonal
disturbances or polycystic ovaries
contributing to this lag.
Please get yourself evaluated for these.
Apart from ovulation, get your partner's semen analysis
done, and after 3 cycles of SIphene, get a tubal patency test also done.
Ensure your diabetes
is controlled, and you maintain an ideal BMI.
Detailed workup of cause of prior 2 abortions is also essential.
Take regular folic acid