First congratulations for the efforts you took and reduced 12 kgs.
Now you said, you are 75 kg.
So, your ideal expected weight can be calculated only after knowing your height.
You need to maintain BMI in 20-25 range.
Now, your periods are regular, that is a good sign.
But, for conception, I would suggest you to consult a fertility
specialist and you and your husband needs complete evaluation and treatment accordingly.
Hope this information is useful.
Continue the healthy life style.
Dr. Mrs. Sumeet Baheti