Ovulation is seen after how many hours of the 'Peak' of the 'Up stroke' in this diagram here :: (A) 0-6 hours, (B) 10-12 hours, (C) 12-24 hours, (D) 24-36 hours
Answer is B. From the onset of the LH surge, it takes 34-36 hours and from the peak it takes 10-12 hours to ovulate. The midcycle LH surge is responsible for a dramatic increase in local concentrations of prostaglandins and proteolytic enzymes in the follicle. These substances progressively weaken the follicular wall and ultimately allow a perforation to form.