Endometrium of 7mm means that the endometrium is 7mm. Generally, you may get your period in about 1 week or you may get your period in the near future, there are individual differences and there is no uniform standard as the time to get your period cannot be judged by the thickness of the endometrium alone. Usually, menstruation occurs when the endometrium is about 10 mm. A menstrual cycle is divided into proliferative phase, ovulatory phase and secretory phase, and the thickness of the endometrium varies at different stages of the menstrual cycle. During the proliferative phase, the endometrial lining is relatively thin, with a thickness of about 2-3mm; during the ovulatory phase, the endometrial lining thickness increases and can reach 5-6mm; when it enters the secretory phase, the endometrial lining thickness can grow to 8mm, and it usually menstruates when it reaches about 10mm. With an endometrial thickness of 7mm, it is usual to wait for about 1 more week to have a period. However, because some people have damage to the endometrium, it usually does not grow to 10mm and they may get their period when the endometrium is around 7mm. Therefore, the exact time when you will have your period needs to be determined in combination with your own sex hormone level and follicle size.