When a woman is forty days pregnant, if the gestational sac falls out, it may be in the shape of a blood clot or it may be encased in pregnancy tissue, which is an early spontaneous abortion. In the early stages of pregnancy, some women will experience bleeding, usually a brown discharge, but some women may experience a bloody discharge, and in more severe cases, a larger blood clot may fall out, possibly expelling the woman’s gestational sac. If the gestational sac is developing normally, it is white and fluffy and may be encased in a blood clot that needs to be rinsed out with water. When placed in the water rinse, can see the diameter of about white balloon, is the gestational sac, if all the red blood clots is not the gestational sac, considered to be a simple blood clots, if it is the gestational sac, the spontaneous abortion has occurred. Most early spontaneous abortions are caused by chromosomal abnormalities in the embryo. There are also maternal factors, such as maternal systemic diseases like diabetes or endocrine abnormalities like hyperthyroidism, which may cause spontaneous abortion. Abnormalities of the uterus and ovarian dysfunction can also cause spontaneous abortion. Each person’s physical condition is different, it is recommended to go to the hospital for ultrasound examination to determine whether there is an embryo in the uterus, so as to determine whether it is a gestational sac or a blood clot that has fallen out.