Me and my bf have been trying to consieve a baby for quite a while but nothing is happening why not?

Ovulation: You only have a 10 percent chance of achieving pregnancy each month this is why the definition of infertility at your age is 1 year i would recommend using an over the counter ovulation kit and have intercourse every other day around the time of ovulation.

Depends: How long to you try... And if your cycles are regular. Record your temperature during several cycles as during ovulation the temperature is higher. If you past 6-8-10 cycles and no pregnancy ur bf needs to be examined: his sperm count/activity. If it is all ok with him y need to be going to some tests. However, u r young and i would not rush to mds. Meantime enjoy each other!