This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Unknown
Cause of repeated 2nd trimester foetal loss: 
Select and explain. 
A. Chromosomal anomaly, B. Intrauterine infection, C. Abnormality of cervix and uterus, D. Hormonal imbalance
C: Abnormality of cervix and uterus
Answer: C: Abnormality of cervix and uterus 
Explanation: Common known causes of abortion:
First trimester: defective germ plasm, hormonal deficiency, trauma, acute infection.
Mid trimester: Cervical incompetence, uterine malformations, uterine fibroid, low implantation of placenta, twins and hydramnios