How common is morning sickness? During early pregnancy, nausea, vomiting and tiredness are common symptoms. Around half of all pregnant women experience vomiting, and more than 80% of women (80 out of 100) experience nausea in the first 12 weeks.
Autumn is the season when warm summer temperatures gradually decrease to the cold of winter. Autumn, or fall, begins on the autumnal equinox, when the hours of daylight are equal to the hours of darkness. In the Northern Hemisphere this occurs on September 22 or 23.
In addition to the autumnal equinox in late September, the Earth undergoes the vernal, or spring, equinox in March; in both cases, the Earth's axis is not tilted toward or away from the sun, NWS officials said. At those times, the lengths of day and night are almost equal across the world.