Answer:
The correct answer is - None of the above.
Step-by-step explanation:
The luteal phase is the stage of the menstrual cycle in which the lining of the uterus or uterine walls normally gets thicker for pregnancy. this phase begins after ovulation and ends just before the periods start. If pregnancy does not take place wall starts to shed.
A normal luteal phase spans from 12 to 14 days, however, it can last anywhere between 11 to 17 days. Less than 10 consider as a shorter luteal phase and more than 17 is a longer luteal phase.