If you are over 35 and trying to get pregnant, it is likely that supplementing with DHEA over a course of several months could help you improve egg quality.

However, before doing so it is advisable to first check your basal DHEA-S values and then monitor them every two months or so because:

1) you want your DHEA-S to rise to the upper third or above of the range which is normal for 25-year old women (who are at the peak of their fertility), but at the same time

2) you don’t want your DHEA to become too high causing side-effects (which is very unlikely as DHEA levels decline as women age, but do keep monitoring every two months).

What else to monitor and to be careful about you will find in this post: Fertility bloodwork: 7 hormones which are most important for fertility.