<prompt> After how many hours of LH surge does ovulation occurs?24-Dec24-4824-3636-48  <response>: The most appropriate option has been taken as the answer. An acute rise of LH triggers ovulation and development of corpus luteum LH surge occurs 34-36 hours before ovulation, ion responsible to prevent poly spermy at the time of feilization is calcium. Ref: Grays 39ep-210-220 