Joseph Stalin (1878-1953) was the dictator of the Union of Soviet Socialist Republics (USSR) from 1929 to 1953. Under Stalin, the Soviet Union was transformed from a peasant society into an industrial and military superpower. However, he ruled by terror, and millions of his own citizens died during his brutal reign.
Most of the polled obstetrician-gynecologists believe pregnancy begins when the sperm fertilizes the egg. But a minority say it doesn't begin until a week later when the fertilized egg implants in the uterus -- the definition given by the American College of Obstetrics and Gynecology (ACOG).
For most women, morning sickness starts about the sixth week of pregnancy, which is about three weeks after conception, assuming you have a normal menstrual cycle. It can start as early as the fourth week, which is right around when you might get your period.