A normal pregnancy lasts about 40 weeks and is grouped into three stages, or trimesters.
Symptoms and early signs of pregnancy include
the absence of menstrual periods,
breast changes,
tiredness,
nausea,
mood swings, or
other symptoms.
A pregnancy test measures the level of hormone human chorionic gonadotropin (HCG) in the urine or blood. The test may be positive before the first signs of pregnancy develop in some women.
Symptoms of late pregnancy can include
heartburn,
