It is said that the Thyroid can only be linked to miscarriage if you have not been treated for it.
IT sure can. It can disrupt your memory, your hormones everything. Increase risks of miscarriages and all. Do get it checked. It is said that everybody should have their thyroid checked especially before conception. We live in a modern world now where there is chemicals used on food, and plastics. It has changed our bodies. Good luck!