When do the upper chambers of the heart contract?

Sex 2 days before ovul. burst of brown mucousy spotting 2 days after ovul. 4 days late for period neg hpt now spotting pinkbrown blood. 2 stringy things 1 clot. using panty liners could i be pg? You have had a slight amount of rectal bleeding when you exercise strenuously you do have a history of hemorrhoids and recently had a colonoscopy that was perfect what could be going on? How does epilepsy affect your job? What is chemical synapse? How many people in the USA have been diagnosed with CRE? How are muscles especially adapted for their function? What is the average range on a pulse? How long can Hepatitis B can survive in dried blood for up to seven days? What are some special disorders? If you take a spoonful of honey before you go to bed will it digest your fat? Can you eat horse chestnuts when pregnant? The acids made in the stomach are neutralized as the food moves onward by the secretions? Is having small breasts a problem? Can chlamydia lie dormant in a person's body for 20 years without infecting anyone and then have very bad case? Does smoking effect vericose veins? What happens when your appendix burst? What is a pee-gu? How long does it take for the symptoms of tetanus to show up? Is rabies in Bucharest? What does each spinal nerve branch into?