Laparoscopic Ovarian Drilling ( LOD) . The outer layer of the ovary will be drilled from 8 or 10 different positions. This changes the hormonal activities and FSH starts to get greater. More eggs get produced, which is an essential part of infertility treatments. In our associated centers 50 percent of women get pregnant through this procedure. This procedure is also preffered for PCOS patients whose LH hormone levels are greater than FSH levels which affects ovulation negatively.