You're a smart girl! Yes indeed, that is the area I will be doing research for, more specifically, what indoor pollutants can affect your hormones! I've been sort of interested in endocrine disruptors since I learned about fish developing another pair of reproductive organs by contamination, so it's interesting

.
To be quite honest though, this wasn't my first choice. I've been meaning to focus myself more on international water resources. Basically, I want to become a professor that does research to help undeveloped countries with their water needs. Make water drinkable, help with drainage issues, develop plans to reduce the impact of storms and/or flooding... basically to spread out the knowledge among the world for a resource that is needed regardless of age, race or culture. When I enrolled in this plan I had all intentions of doing this, but there wasn't any positions available for research, and I didn't want to put off grad school longer.
And you are right about the epidemiology stuff! I guess things have changed since I read about it. I originally read these things around 2007. I was at my university's career office and I browsed around a career report. Since I was doing engineering, epidemiology was right there true... and it seemed like it was the ONLY career they mentioned that wasn't recommendable to study and it was quickly declining. Now that I checked the 2008 report on BLS, it seems like it has changed. I guess the avian/swine flu had a major impact on this career and the demand has increased significantly! That's great! I will say that I felt a bit annoyed that this career was losing popularity!
And regarding that masters hmmm... I guess the reason it'd benefit you its because it makes you more versatile? I can see how a masters in epidemiology can only narrow you down to epi jobs, while a MPH you can get those, PLUS MORE! That's the first thing I can think of, but I am not exactly sure either.
And another thing... I like that you still do MPH better. I have a bit of a bias against studying medicine if your goal is to help people. I think that prevention plays a bigger role against remediation, so you obtaining a job where you are able to identify the source of the problem and try to attack it from its root is more beneficial than just helping patients on a one-by-one basis. Your target audience is significantly more primordial too (as you will help babies as well as parents)... I really respect your choice! This is why I like the whole public health thing... it's similar to what I want to do, but instead of focusing on water, it is on health!
(Cute new profile pic by the way

. I approve. )