You are not asking a question. Perhaps you can read the general rules of the forum at the following link and then ask your specific question. What is it that you want, a translation to Spanish? Did you make any attempts? What is the part that presents difficulties? I am sure some people will be able to help you once they know what you need.
If what you want is a Spanish translation, it could be something like this,
En tres meses le enviaremos una carta nuevamente para recordarle que se repita el análisis de lípidos en ayunas para monitorizarlo (or "evaluar su curso," or "ver cómo evoluciona," or "estudiar su evolución," etc.).