When is the best to tell my boyfriend the truth about my condition?

We've been together for 2 years now, loved each other and have talked about the future and the following plans lately. Our latest conversations included about kids. I started crying and locked myself in my room. When he asked what was wrong, I excused it with being overwhelmed with work and other family issues that he's aware of.

The real issue with me is infantile uterus, which I've known for years before we even met. My uterus never developed property to its full size past puberty and any attempted pregnancy will likely lead to miscarriage after miscarriage, unlikely that I'll be able to carry full term. Only my parents know about my condition. No else knows. When do I tell him?

From a man's opinion, when would you like to know about this? Know that even at a young age, I got denied of something so significant in a woman's life.

When is the best to tell my boyfriend the truth about my condition?
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