Thank you for your query.
As you have conceived before, chances of repeat pregnancy
are good for you.
I wonder how you were told that you aborted because egg formation was not proper, probably there was some genetic defect in the fetus, which could be due to chromosomal abnormality in the egg.
however, your size of egg for day 10 is quite good, and you have good chances at ovulation.
Please have a couple karyotype
for genetic evaluation.
Also, take adequate folic acid
Rule out uterine anomalies, hormone imbalance
, infections and autoimmune conditions as cause of missed abortion