The transfer of an embryo into the uterus is like sowing a seed, and this seed cannot grow without the fertile soil, the endometrium, if it wants to germinate and flourish. The quality of the soil is mainly determined by two hormones in the mother’s body, namely estrogen and progesterone. Estrogen is mainly responsible for the thickness of the soil, while progesterone is mainly responsible for the softness and fertility of the soil. These two hormones interact and coordinate together to create a balance that provides a good environment for the development of the seed. Causes of Bleeding The main cause of bleeding is a disruption in the balance of estrogen and progesterone. Either too much estrogen or too little progesterone can cause bleeding. Imagine that too much estrogen makes the soil thick, but without the corresponding progesterone to make the soil soft and fertile enough, then the land is facing sanding, which is extremely detrimental to the development of the seeds. When the land is sandy and the soil is eroded, the mother will show the symptoms of bleeding. Diagnosis of bleeding 1. Luteal insufficiency. The corpus luteum is responsible for producing progesterone. When the corpus luteum is not functioning well, less progesterone is produced and the soil is not fertile. 2, biochemical pregnancy. Biochemical pregnancy is when the embryo enters the uterus and does not settle, which means the seed does not fall in the soil. And at this time, the mother has prepared the soil beforehand in order to welcome the arrival of the seed. When it is found that there is no seed in the soil, the soil prepared beforehand is meaningless and will be washed away, and bleeding will also occur at this time. 3. Premature miscarriage. This condition is usually followed by bleeding and lower abdominal pain or back pain. 4.Ectopic pregnancy. It is also often referred to as ectopic pregnancy. This is when the seeds do not fall in the pre-prepared soil, but fall in other places where there is no soil. In order to survive, the seed will keep extending its “root system” to absorb nutrients, just like a small tree rooted in a stone, which not only grows thin, but also breaks the stone that carries it, thus leading to rupture and bleeding. What should I do after bleeding? Don’t panic after you find bleeding. Do not do strenuous exercise and pay attention to rest. Contact your doctor promptly and go to the hospital. Take a medical record book with you and note down your situation before and after the bleeding, the amount of bleeding, and whether you have other symptoms, so that the doctor can understand the condition and deal with it in time.