"Thyroid hormones have profound effects on reproduction and pregnancy. Thyroid dysfunction is implicated in a broad spectrum of reproductive disorders, ranging from abnormal sexua| development to menstrual irregularities and infertility. ,"
And yes, what Ginagirl said, it takes two.
There all all sorts of factors that can be affecting you and your mates reproductive health(the latest, that I read about today, the chemicals used on fast-food wrappers) and, in the case of the man, these factors can affect the viability of the sperm. I'm sure that you know that though, in fact, I'm sure that you know way more than you ever wanted to know. My heart goes out to you. And once again, I am glad that you are here.