Sweating at night during the 13th week of pregnancy may be related to progesterone elevation, malnutrition and other conditions. 1. Progesterone elevation: 13 weeks pregnant night sweating may be due to the body’s progesterone elevation caused by physiological reactions, the increase in hormones will lead to adrenocortical hyperfunction, so that the basal metabolism will be elevated, resulting in accelerated blood flow, sweating increased. 2. Malnutrition: 13 weeks pregnant night sleep sweating may also be with the recent poor nutritional intake causes, women’s nutritional needs during pregnancy compared to the usual will be more, if the nutritional supplementation is not timely, may lead to physical weakness, sleep sweating occurs. The woman should pay attention to more rest during pregnancy, at the same time should relax, avoid nervousness, anxiety, any discomfort should be timely to the hospital, by the doctor to clarify the diagnosis, and cooperate with the doctor to deal with the symptoms. Sweating at night during the 13th week of pregnancy alone cannot determine the cause accurately, but also needs to be combined with the characteristics of the medical history, other test results to make an accurate judgment, it is recommended to clarify the cause of the disease under the guidance of a doctor.