The SI derived unit for volume is the cubic meter. 1 cubic meter is equal to 264.172051242 gallon, or 1000 litre. Note that rounding errors may occur, so always check the results.
Snoring is a common problem, caused by a blockage of the nasal passages during sleep. Snoring can be a sign of a serious problem called sleep apnea, where you stop breathing for 10 seconds or more during sleep. There are two types of doctors who treat snoring problems: sleep medicine doctors and otolaryngologists (ear, nose and throat doctors). (AndreyPopov/iStock/Getty Images)
An obstetrician is a doctor who specializes in pregnancy, childbirth, and a woman's reproductive system. Although other doctors can deliver babies, many women see an obstetrician, also called an OB/GYN. Your obstetrician can take care of you throughout your pregnancy, and give you follow-up care such as annual Pap tests for years to come. OB/GYNs have graduated from medical school and completed a four-year residency program in obstetrics and gynecology.