My husband and I had been unable to conceive naturally. We were told it would not happen because of his sperm count, a result of a childhood injury. IVF was our only option.
I got pregnant
After two unsuccessful attempts at IVF we chose not to try anymore. About 7 years later (with me being on and off birth control, and after my husband's MS diagnosis) nothing had happened. Then the very first cycle I had after stopping birth control the latest time for unrelated issues, I got pregnant.
Affects of Tecfidera
I researched several factors and came across a statement by someone saying Tecfidera increased sperm production in mice. Is it possible it does this in humans as well? It's all just anecdotal evidence, and it doesn't matter for us for the future, but I am curious if anyone knows anything about this.