Menstruation delays 16 days, early pregnancy test is not pregnant, b ultrasound also shows no pregna

According to your description of menstruation delayed 16 days, but after examination confirmed no pregnancy can be considered endocrine disorders, if diagnosed through sex hormone examination endocrine disorders, can be under the guidance of a doctor application progesterone and other hormonal drugs conditioning menstruation. Women should pay attention to relax mood, pay attention to keep warm.