Thanks for the query.
Usually after attaining more than 20 mm size, ovarian follicle
will release the ovum.
As there is no ovulation after attaining 38 mm size also, better to go for hcg injection
with your doctor's advice.
This can help in releasing the ovum.
If ovum does not get release even after taking the injection, there is possibility of lutinized unruptured follicle.
In that case, better to leave this cycle.
In the next menstrual cycle, better to get throughly evaluated.
Go for hormonal
profile including estrogen, progesterone
, LH and FSH etc.
And take hormonal support along with ovulation induction
drugs with your doctor's advice.