If the endometrial lining is only 7mm thick at the time of ovulation, it is difficult for a fertilized egg to implant. The minimum thickness of the endometrium must be at least 9mm for a fertilized egg to be able to implant. In this case, it is recommended to have a blood test for sex hormone 6 to see if estradiol is normal and if the ovaries are functioning normally. It is recommended to start supplementing with Glaxo (half a tablet once a day for seven days) on the 12th day of menstruation to improve the thickness of the endometrium, so that pregnancy is possible. It is also recommended to drink more soy milk, royal jelly and eat more black beans, peanut butter and onions in daily life, which can thicken the endometrium by supplementing phytoestrogens and animal estrogens.