We found no significance in female and male overweight, the reasons for IVF (tubal factor, ovulatory dysfunction, male factor, endometriosis), poor-type endometrium, fertilization methods, smoking, with the proportion of thin or thick endometrium, ovarian response, primary infertility, GnRH agonist, and high education (Fig. 2). This evidence concerns the gene GNRH1 and endometriosis.