We usually think of air pollution as being outdoors, but the air in your house or office could also be polluted. Sometimes a group of people have symptoms that seem to be linked to time spent in a certain building. There may be a specific cause, such as Legionnaire's disease.
Symptoms of early pregnancy can also be similar to symptoms experienced prior to the menstrual period, so a woman may not recognize the symptoms as related to pregnancy. This article describes the most common symptoms of pregnancy in its early and later stages. Medically Reviewed by a Doctor on 12/4/2014.
Physical Symptoms of Twin Pregnancies. Most of the common first signs of twin pregnancy vary little from the first signs of a singleton pregnancy. The main difference is usually the impact or intensity of the pregnancy symptoms. Your symptoms may be exaggerated because a woman carrying twins produces more pregnancy hormones than a woman carrying one baby.