Thanks for contacting ATD.
If you have recently been off depot injection, then it generally takes 2-3 cycles / months for the ovulation to return naturally and regularity of menstrual cycles as well. Once the ovulation is achieved or re-established which can be tested with the use of ovulation kits, then you would be ready to conceive again.
I hope I have answered your query in detail.
Wishing you good health,
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