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: Gynaecology & Obstetrics
Fecundability is 
Select and explain. 
A. Probability to achieve a live birth within one menstrual cycle, B. Probability to achive pregnancy within one menstrual cycle, C. Probability to achive a twin pregnancy within one menstrual cycle, D. Probability to achive a live birth within one year of treatment for infertility
B: Probability to achive pregnancy within one menstrual cycle
Answer: B: Probability to achive pregnancy within one menstrual cycle 
Explanation: Fecundability is probability to achive pregnancy within one menstrual cycle.