contraction

contraction
収縮、短縮、縮小

Period of general economic decline characterized by high unemployment, falling wages, and (usually) low inflation.

She is having contractions 2 to 3 minutes apart lasting 60 seconds.
彼女は陣痛が2～3分おきに1分ある。

Call your doctor if the contractions are 5 minutes apart and last 30 seconds. 
もし陣痛が5分間隔で30秒続くようなら医者に電話しなさい。