How long after a missed period should you take a pregnancy test?

I don't think  is the best site to ask this sort of question. Try getting in touch with someone in the medical field for a truly accurate answer. The best I can share with you is that a period can be "missed" or "late" for many reasons. This includes diet, stress levels, hormones, etc. Think about your latest eating habits. A lot of acids, such as lemon juice, can delay a period. Have you been stressed? Worrying about a pregnancy may cause your period to come even later, and that won't help you much. I suggest taking a pregnancy test 4 days after a supposed missed period due to the hormone HCG doubles essentially every 2-3 in early pregnancy. This is the hormone a pregnancy test attempts to detect. Take it in the morning, when levels are highest. Also, visit a doctor to be sure of what's going on with your body. 

Why  do you think body composition focuses  on the  ratio  of  fatty tissue  to  other body tissue? why is  body composition not related  to  weight?