difficult birth, typically caused by a large or awkwardly positioned fetus, by smallness of the maternal pelvis, or by failure of the uterus and cervix to contract and expand normally:the incidence of dystocia or difficult calvings
Origin:
early 18th century: from Greek dustokia, from dus- 'difficult' + tokos 'childbirth'
dystocia in other Oxford dictionaries
Definition of dystocia in the US English dictionary
