What is the difference between positive and negative feedback in hormone regulation?

Can you have 3 negative test and one postive tests back . Could the tests be wrong ? And still could I be pregnant ?

Not a nice thing to ask but bugging me. I seem to get different results from my douche some days, is there a trick to it? Wh...

is it normal for your pee to smell different???

what is the difference between a basal thermometer and a normal household digital one?

What's the differences between laxatives and colon cleansers?

I took a pre-employment drug test and I take effexor for anxiety. I took a home drug test before the test because my research...

I am on birth control and two weeks after my period I had severe hard and sore nipples for a week. I took a pregnancy test af...

Ok well my period is 1 week late, i was due on on Monday the 7th. I took a test on the Tuesday night and it said negative. I ...

I've smoked weed before and I love it!! and im curious about E pills. are the side effects different?

What's the difference between the Flu and common cold? Just wondering.