-Dr. Uma Shrivastava
Luteinized Unruptured Follicle(LUF) is the condition when there is normal ovum development within the follicle which turns into the corpus luteum without its release from the follicle due to inability of follicle rupture.
The possible cause of LUF is absence of LH surge at the time of ovulation. LH indirectly lutenizes the follicle by inducing progesterone production in the follicle. Formation of corpus luteum continues & production of both estrogen & progesterone hormones also continues as in normal folliculogenesis.